We mounted a GH2 and 7-14 lens on Dustin's glider, and tried to get some air-to-air formation flying action. Here are a few frames from the video:
All photos by Ryan Voight
Monday, November 28, 2011
Fall Flying
US Hang Gliding Team member Dustin Martin and D|Focus contributor Ryan Voight got together over Thanksgiving for a little filming session at Point of the Mountain in Utah. After a few days of less-than-ideal conditions, we finally got a good day to get some shooting done.
We mounted a GH2 and 7-14 lens on Dustin's glider, and tried to get some air-to-air formation flying action. Here are a few frames from the video:
We mounted a GH2 and 7-14 lens on Dustin's glider, and tried to get some air-to-air formation flying action. Here are a few frames from the video:
Wednesday, August 3, 2011
Panasonic GH2/NikonD300s Photo Comparison
Words and imagery by Ryan Voight, D|Focus contributor
Nikon's D300s was their second DSLR to include video functionality (following the D90). The D300s walks the fine line between consumer and pro gear... it is (was?) Nikon's highest level DX format camera (IE not full-frame). It has a large, highly weather sealed magnesium body, and most functions have their own designated buttons- something most consumer cameras don't include. For the past year, the D300s has been my go-to photo AND video camera.
The Panasonic GH2 is best described as a mirror-less DSLR. Picture a DSLR operating in 'live view' mode, all the time. By removing the mirror, the camera is considerably smaller and lighter than a traditional SLR or DSLR. But can it measure up to a 'real' DSLR?
It's a small and light package, but it's feature-rich. It takes 16 MP photos (15MP when set to 3:2 aspect ratio, the standard for DSLRs), vs 12.2 MP for the D300s... but the big upgrade is the video capabilities! This little camera records beautiful full 1080 HD video at 24 frames/sec... or 720 HD at 60p- perfect for slow motion effects. GH2 video is captured using the AVCHD codec. The other really nice thing is that this camera allows full-manual control over video recording- something the Nikon lacks.
The more I play with the video, the more I am impressed. I've begun to think of this little camera as a film-like VIDEO camera, that also takes photos. Here's a quick sample of how sharp the video looks:
Nikon's D300s was their second DSLR to include video functionality (following the D90). The D300s walks the fine line between consumer and pro gear... it is (was?) Nikon's highest level DX format camera (IE not full-frame). It has a large, highly weather sealed magnesium body, and most functions have their own designated buttons- something most consumer cameras don't include. For the past year, the D300s has been my go-to photo AND video camera.
The Panasonic GH2 is best described as a mirror-less DSLR. Picture a DSLR operating in 'live view' mode, all the time. By removing the mirror, the camera is considerably smaller and lighter than a traditional SLR or DSLR. But can it measure up to a 'real' DSLR?
It's a small and light package, but it's feature-rich. It takes 16 MP photos (15MP when set to 3:2 aspect ratio, the standard for DSLRs), vs 12.2 MP for the D300s... but the big upgrade is the video capabilities! This little camera records beautiful full 1080 HD video at 24 frames/sec... or 720 HD at 60p- perfect for slow motion effects. GH2 video is captured using the AVCHD codec. The other really nice thing is that this camera allows full-manual control over video recording- something the Nikon lacks.
The more I play with the video, the more I am impressed. I've begun to think of this little camera as a film-like VIDEO camera, that also takes photos. Here's a quick sample of how sharp the video looks:
Wing-mounted GH2 shooting 1080 HD @ 24 fps
But for me, the question has remained... how good of a PHOTO camera is it? I had some spare time yeserday, so I headed up American Fork Canyon to see what I could find to take some test photos of. I noticed the river that follows the road (or does the road follow the river?) was still quite high- and I had my sticks in the car, so I thought some slow shutter speed water shots might be a good test.
Because it was very bright (direct sunlight in some cases), I had to stop down to F/22... this meant everything was in focus... which isn't my favorite effect. In some of these shots, particularly ones where I was lazy and zoomed in, rather than get closer, the foreground has very little separation from the background. I figure with was about the lens and shooting parameters much more than the camera... but I'll have to do more testing...
Obviously, this little camera is capable of taking some nice images! I'm not convinced that it takes better images than my Nikon D300s- which I have absolutely loved everything about, except for it's video capabilities. The GH2 photos require a quite a bit more 'developing' to get the colors how I like them (or even how I remember it looking in real life). GH2 photos also tend to favor a cooler tone, versus the Nikon favored warmer photos- I prefer warmer, looks less 'digital'...
The Nikon D300s is only 12.2 MP, but the color reproduction seems much better, and much more true-to-life. I'm not really surprised by any of this, the D300s is a fairly pro-level camera, and the GH2 is clearly consumer oriented. I had originally planned on selling the Nikon... but now I'm torn... When I ordered the GH2 I was ready to trade some photo quality for vastly better video capabilities... but now I'm having a hard time biting that bullet....
Here are some Nikon D300s images for comparison (different location, different day)...
Also worth mentioning- I'm editing the GH2 images using Photoshop RAW... and I edit the Nikon images using Nikon's Capture NX2 software. I absolutely love photoshop (for some things)- but I have been very, very impressed with Nikon's software, and feel it is a better tool for developing digital photos. Unfortunately, although not that surprising, the Nikon software does not support the GH2's raw file format...
Because it was very bright (direct sunlight in some cases), I had to stop down to F/22... this meant everything was in focus... which isn't my favorite effect. In some of these shots, particularly ones where I was lazy and zoomed in, rather than get closer, the foreground has very little separation from the background. I figure with was about the lens and shooting parameters much more than the camera... but I'll have to do more testing...
Click an image to see it larger
All of these photos were taken with the 14-140mm Panasonic 'kit' lens. I believe they were all at f/22, with shutter speeds around 1/6 sec, all at ISO 160.
Obviously, this little camera is capable of taking some nice images! I'm not convinced that it takes better images than my Nikon D300s- which I have absolutely loved everything about, except for it's video capabilities. The GH2 photos require a quite a bit more 'developing' to get the colors how I like them (or even how I remember it looking in real life). GH2 photos also tend to favor a cooler tone, versus the Nikon favored warmer photos- I prefer warmer, looks less 'digital'...
The Nikon D300s is only 12.2 MP, but the color reproduction seems much better, and much more true-to-life. I'm not really surprised by any of this, the D300s is a fairly pro-level camera, and the GH2 is clearly consumer oriented. I had originally planned on selling the Nikon... but now I'm torn... When I ordered the GH2 I was ready to trade some photo quality for vastly better video capabilities... but now I'm having a hard time biting that bullet....
Here are some Nikon D300s images for comparison (different location, different day)...
Also worth mentioning- I'm editing the GH2 images using Photoshop RAW... and I edit the Nikon images using Nikon's Capture NX2 software. I absolutely love photoshop (for some things)- but I have been very, very impressed with Nikon's software, and feel it is a better tool for developing digital photos. Unfortunately, although not that surprising, the Nikon software does not support the GH2's raw file format...
Friday, July 8, 2011
Switzerland
Here's the start to the 2011 European tour that includes the Swiss Nationals and the World Championships.
Flew over to Zurich from LA with Jeff Shapiro on the 4th of July. Swiss Nic and Steve Blinkensop picked us up at the airport and we headed to Nic's home in Baden (originally a Roman town). Upon unpacking my glider in Zurich, I found a large dent in my leading edge tube.
Nic had a spare tube that need to a slight modification, so Blinky and Carole helped my get the tools to fix it. Dustin arrived later and we had some fantastic home-made green curry a la Blinky. 
The next morning we were off to Fiesch with 4 gliders, 10 harnesses and 4 bodies crammed in Nic's sweet Mercedes. driving south past Interlaken we drove the car onto a train that took us through a tunnel deep through the Alps. In Fiesch we met up with Derreck and James to register and parade through town.
Weather looked pretty bad and there were doubts as to whether we would fly at all, but day one turned out great.
Monday, January 17, 2011
On Gear Ratios & Modules etc.
A question about pitch, module and gear ratios came in today so I though I should share this info as it may be useful to others. First some gear nomenclature.
A round gear's Diametrical pitch is defined as its number of teeth divided by its pitch diameter.
Pitch Diameter is NOT the overall outer diameter of the gear, its the diameter of the gear to some point about half way up the gear teeth. Its a small difference from the over all diameter of the gear if we are talking relatively small teeth (like those used by follow focus units) so its not that important to differentiate.
A gears Module(mod) is just the mathematical inverse of the diametrical pitch.
The cine standard is 32 pitch (measured in number of teeth per inch) or 0.8 mod (measured in millimeters per number of teeth)
So, some math specific to the D|Focus:
Pitch = # teeth / Pitch diameter,
D|Gear is ~4" pitch diameter,
# teeth = Pitch * Pitch diameter = 32 teeth per inch * 4 inch = 128 teeth
Module is the inverse of pitch, so Mod = Pitch Diameter / # teeth
However, for whatever reason we measure module in millimeters, not inches. 4" = 101.6mm
# teeth = pitch diameter / Mod = 101.6 mm / 0.8 teeth per mm = 127 teeth
Discrepancy in # teeth in theses 2 calculations is due to inaccurate measurement of pitch diameter (I just measured it with a ruler, could get out my CAD drawings and get an exact measurement, or count # teeth but I'm lazy.)
The drive gear's pitch diameter = 1.5 inch so it has 48 teeth
128 / 48 = 2.667, so the D|Focus + D|Gear as a 2.667 to 1 ratio
So one full, 360 degree rotation of the D|Focus knob will give you a little more than 1/3rd (~135 degrees) the rotation on your lens' focus ring.
There are also some other modules (0.5, 0.6) used on Canon and Fuji broadcast, ENG, 2/3" style cameras.
Types of gears:
The D|Focus, uses 2 general types of gears. The Drive and lens gears are called Spur gears. Pretty much the simplest type of gear. The gearbox used Miter gears which are used to change the direction of motion. Some other follow focuses use helical gears to accomplish this.
A round gear's Diametrical pitch is defined as its number of teeth divided by its pitch diameter.
Pitch Diameter is NOT the overall outer diameter of the gear, its the diameter of the gear to some point about half way up the gear teeth. Its a small difference from the over all diameter of the gear if we are talking relatively small teeth (like those used by follow focus units) so its not that important to differentiate.
A gears Module(mod) is just the mathematical inverse of the diametrical pitch.
The cine standard is 32 pitch (measured in number of teeth per inch) or 0.8 mod (measured in millimeters per number of teeth)
So, some math specific to the D|Focus:
Pitch = # teeth / Pitch diameter,
D|Gear is ~4" pitch diameter,
# teeth = Pitch * Pitch diameter = 32 teeth per inch * 4 inch = 128 teeth
Module is the inverse of pitch, so Mod = Pitch Diameter / # teeth
However, for whatever reason we measure module in millimeters, not inches. 4" = 101.6mm
# teeth = pitch diameter / Mod = 101.6 mm / 0.8 teeth per mm = 127 teeth
Discrepancy in # teeth in theses 2 calculations is due to inaccurate measurement of pitch diameter (I just measured it with a ruler, could get out my CAD drawings and get an exact measurement, or count # teeth but I'm lazy.)
The drive gear's pitch diameter = 1.5 inch so it has 48 teeth
128 / 48 = 2.667, so the D|Focus + D|Gear as a 2.667 to 1 ratio
So one full, 360 degree rotation of the D|Focus knob will give you a little more than 1/3rd (~135 degrees) the rotation on your lens' focus ring.
There are also some other modules (0.5, 0.6) used on Canon and Fuji broadcast, ENG, 2/3" style cameras.
Types of gears:
The D|Focus, uses 2 general types of gears. The Drive and lens gears are called Spur gears. Pretty much the simplest type of gear. The gearbox used Miter gears which are used to change the direction of motion. Some other follow focuses use helical gears to accomplish this.
Monday, December 13, 2010
Info On The D|Matte
Hello everyone, this post is long over due.
I have been posting little bits of info on twitter (@dfocus) about the upcoming D|Matte Matte Box but have yet to post anything formal, so here we go.
The D|Matte, like the D|Focus, is an entry level product intended for amateur/hobbiest/student film makers on a budget. It has been designed from the ground up for use with HDSLR cameras.
List of features:
- Two 4x4 filter tray-less filter holders (one rotating.) No filter trays here, just slide the filter into the slot.
- Wide angle lens compatible. Will work with lenses as wide as 20-24mm (depending on the lens) on a full frame camera.
- Clip on design will fit pretty much any lens with filter threads up to 82mm. This includes all Canon L series lenses (except for the super telephoto) and Zeiss primes.
- Each D|Matte will come with an 82mm attachment ring. Use step-up rings to fit smaller lenses.
- Included top french flag.
- Made of injection molded plastic (probably ABS and polycarbonate, not 100% sure yet and won't be until the tools are finished.)
Future options:
- Height adjustable, swing away rail mount attachment. (This may be available at the same time as the D|Matte. If not, it should follow shortly.)
- Side Flags. These will follow the D|Matte by 2 - 3 months and will be an upgrade for purchase.
- Once everything is out there will likely be a combo deal including all accessories.
I'm pretty excited about the D|Matte. Its something I have been wanting for a while now myself and an area where I think there is room in the market. Many matte boxes are designed for Cine style lenses and as a result have to be quite large and heavy, not exactly ideal for HDSLR work.
The fact that it's going to be mostly injection molded means there will be much less production work for us to do which means that we should be able to get them out much faster and [hopefully] not experience that same delays we are constantly facing with the D|Focus.
The D|Matte, like the D|Focus will not be sold direct, but will be available through our dealers. This helps keep our overhead down so we can just concentrate on building products while letting someone else deal with the shipping (which is a ton more work than one might think.) The retail price is expected to be $299.99 for the basic snap-on version which includes the adapter ring and french flag. [Price & features subject to change]
I do not have any good pictures as the prototype looks somewhat rough, but these should help you get a basic idea:
EDIT - Forgot to mention, its looking like the D|Matte will be available mid-February +/- a couple weeks.
I have been posting little bits of info on twitter (@dfocus) about the upcoming D|Matte Matte Box but have yet to post anything formal, so here we go.
The D|Matte, like the D|Focus, is an entry level product intended for amateur/hobbiest/student film makers on a budget. It has been designed from the ground up for use with HDSLR cameras.
List of features:
- Two 4x4 filter tray-less filter holders (one rotating.) No filter trays here, just slide the filter into the slot.
- Wide angle lens compatible. Will work with lenses as wide as 20-24mm (depending on the lens) on a full frame camera.
- Clip on design will fit pretty much any lens with filter threads up to 82mm. This includes all Canon L series lenses (except for the super telephoto) and Zeiss primes.
- Each D|Matte will come with an 82mm attachment ring. Use step-up rings to fit smaller lenses.
- Included top french flag.
- Made of injection molded plastic (probably ABS and polycarbonate, not 100% sure yet and won't be until the tools are finished.)
Future options:
- Height adjustable, swing away rail mount attachment. (This may be available at the same time as the D|Matte. If not, it should follow shortly.)
- Side Flags. These will follow the D|Matte by 2 - 3 months and will be an upgrade for purchase.
- Once everything is out there will likely be a combo deal including all accessories.
I'm pretty excited about the D|Matte. Its something I have been wanting for a while now myself and an area where I think there is room in the market. Many matte boxes are designed for Cine style lenses and as a result have to be quite large and heavy, not exactly ideal for HDSLR work.
The fact that it's going to be mostly injection molded means there will be much less production work for us to do which means that we should be able to get them out much faster and [hopefully] not experience that same delays we are constantly facing with the D|Focus.
The D|Matte, like the D|Focus will not be sold direct, but will be available through our dealers. This helps keep our overhead down so we can just concentrate on building products while letting someone else deal with the shipping (which is a ton more work than one might think.) The retail price is expected to be $299.99 for the basic snap-on version which includes the adapter ring and french flag. [Price & features subject to change]
I do not have any good pictures as the prototype looks somewhat rough, but these should help you get a basic idea:
EDIT - Forgot to mention, its looking like the D|Matte will be available mid-February +/- a couple weeks.
Thursday, July 22, 2010
D|Focus Announces Sponsorship Deal With Zippy Zac Majors
Last week, I spend a couple days up in beautiful Santa Barbara California to shoot a promotion video for "Zippy" Zac Majors, pro hang glider pilot, hang gliding instructor and all around cool guy. Zippy is one of the top pilots in the world but hang gliding is not a sport that attracts major sponsorship deals and the cost of international competition can be quite high.
Zippy:
I am very proud to announce that D|Focus is an official sponsor of Zippy in all his hang gliding efforts. In exchange for sponsorship funding Zippy will wear the D|Focus logo atop his glider and help take part in various film projects to help showcase D|Focus gear in action as well as get valuable field test time. I am happy to report that over 3 days of shooting the new D|Focus V3 worked very well in a variety of environments.
Here is Zippy doing his thing over the Beach:
Here Zippy does a fly over of me on my D|Focus branded glider:
Zippy being interviews by Jared Abrams about DSLRs and hang gliding for Cinema5d.com
In case you guys don't already know, hang gliding is my passion. Its my motivation for film making and building affordable film making accessories. There is a reason my Vimeo page is almost all hang gliding videos! So its pretty natural for me to channel some of the D|Focus profits back into the community (and hopefully get some valuable advertising and promotion out of it.)
Zippy leaves for Italy in a few days where he (along with 4 other pilots) will be representing the US in the "Pre-Worlds" hang gliding championships. We here at D|Focus wish him the best of luck!
I hope to have the promotional film up in a couple of days and will update this post when its ready!
-Dave
Zippy:
I am very proud to announce that D|Focus is an official sponsor of Zippy in all his hang gliding efforts. In exchange for sponsorship funding Zippy will wear the D|Focus logo atop his glider and help take part in various film projects to help showcase D|Focus gear in action as well as get valuable field test time. I am happy to report that over 3 days of shooting the new D|Focus V3 worked very well in a variety of environments.
Here is Zippy doing his thing over the Beach:
Here Zippy does a fly over of me on my D|Focus branded glider:
Zippy being interviews by Jared Abrams about DSLRs and hang gliding for Cinema5d.com
In case you guys don't already know, hang gliding is my passion. Its my motivation for film making and building affordable film making accessories. There is a reason my Vimeo page is almost all hang gliding videos! So its pretty natural for me to channel some of the D|Focus profits back into the community (and hopefully get some valuable advertising and promotion out of it.)
Zippy leaves for Italy in a few days where he (along with 4 other pilots) will be representing the US in the "Pre-Worlds" hang gliding championships. We here at D|Focus wish him the best of luck!
I hope to have the promotional film up in a couple of days and will update this post when its ready!
-Dave
Thursday, January 14, 2010
New Drive Gears Coming Soon(ish)
UPDATE (1/23/10) - My timing on these couldn't have been much better. Earlier in the week I found out that I had depleted my supplier's stock of the current drive gear. I will only have another 50 or so before there is about a 2 month wait. That is obviously too long, so when the 50 are gone we will just be going with the new, custom drive gears.
Unfortunately my timing wasn't exactly perfect. Orders up to about January 9th will ship with the original gear. Orders after that may see an additional week or so delay while the mold for the new gears is getting built and tested.
If you have an order out and don't want to (or can't) wait for the new gears, I still have some of the older 2" diameter gears available (these are the ones pictured on the web site.) Email me (dfocusinfo *AT* gmailcom) if you would like to go this rout. Remember, the new custom gears will be very easy to install, just a single set screw so you can always upgrade later.
______
In an effort to reduce the time it takes to build a D|Focus, I have decided to have purpose built drive gears manufactured. Let me give you an idea of what goes into just the drive gear currently:
1. I order them from a gear supplier in New York. UPS ground shipping takes about a week to deliver them
2. I have to install a brass insert so a set screw can be tightened, without the insert the threads would strip very easily.
2.a) I order brass tubing in 1 foot lengths with a 1/4" outer diameter [OD] (same as the inner diameter [ID] of the drive gears, so the brass can be pressed in) and 3/16" ID. However the tubing comes over sized, meaning the ID is a bit smaller, so it has to be reamed out to fit the 3/16" shafts. We do this on the manual lathe.
b) The brass tubing has to be cut into 0.400" lengths. The only reliable way I have found to cut brass tubing is with a manual razor saw. The material is too soft to part it off on the lathe, it will just bend. This manual sawing is very time consuming, but it works and is reliable.
3. the inserts are pressed into the gears using a bench vise.
4. The gears are drilled and tapped for the set screw.
By having purpose made gears I can eliminate steps 1 and 2. The gears will have an ID the same as the brass collars included on each D|Focus. That way I can just press those collars into the new gears, drill and tap.
And since we are going to the effort to make gears, we are making them they way they should be, thicker. They will have the same face width as the lens gears, 0.400". This should make the overall experience easier to setup/align, make it smoother and allow for more focus ring "travel."
Here are the latest renders:
I can't yet say when exactly these will be ready. Tommy, my mold maker is a pro and works very fast, but injection molding is far from trivial. We have a couple of issues and it make take some experimenting to make sure the gears come out right. Expect at least 4 weeks.
Will this effect the overall price of the D|Focus? Probably not. It looks like these will cost much less than the current gears I am ordering, but the initial tooling cost is very high. For now, let me just reassure you all that I am committed to offer the affordable follow focus solution.
All current orders will ship with the current drive gears. However I will have a lot of these new gears made and will probably be able to make them available for a very low cost to existing customers.
Unfortunately my timing wasn't exactly perfect. Orders up to about January 9th will ship with the original gear. Orders after that may see an additional week or so delay while the mold for the new gears is getting built and tested.
If you have an order out and don't want to (or can't) wait for the new gears, I still have some of the older 2" diameter gears available (these are the ones pictured on the web site.) Email me (dfocusinfo *AT* gmailcom) if you would like to go this rout. Remember, the new custom gears will be very easy to install, just a single set screw so you can always upgrade later.
______
In an effort to reduce the time it takes to build a D|Focus, I have decided to have purpose built drive gears manufactured. Let me give you an idea of what goes into just the drive gear currently:
1. I order them from a gear supplier in New York. UPS ground shipping takes about a week to deliver them
2. I have to install a brass insert so a set screw can be tightened, without the insert the threads would strip very easily.
2.a) I order brass tubing in 1 foot lengths with a 1/4" outer diameter [OD] (same as the inner diameter [ID] of the drive gears, so the brass can be pressed in) and 3/16" ID. However the tubing comes over sized, meaning the ID is a bit smaller, so it has to be reamed out to fit the 3/16" shafts. We do this on the manual lathe.
b) The brass tubing has to be cut into 0.400" lengths. The only reliable way I have found to cut brass tubing is with a manual razor saw. The material is too soft to part it off on the lathe, it will just bend. This manual sawing is very time consuming, but it works and is reliable.
3. the inserts are pressed into the gears using a bench vise.
4. The gears are drilled and tapped for the set screw.
By having purpose made gears I can eliminate steps 1 and 2. The gears will have an ID the same as the brass collars included on each D|Focus. That way I can just press those collars into the new gears, drill and tap.
And since we are going to the effort to make gears, we are making them they way they should be, thicker. They will have the same face width as the lens gears, 0.400". This should make the overall experience easier to setup/align, make it smoother and allow for more focus ring "travel."
Here are the latest renders:
I can't yet say when exactly these will be ready. Tommy, my mold maker is a pro and works very fast, but injection molding is far from trivial. We have a couple of issues and it make take some experimenting to make sure the gears come out right. Expect at least 4 weeks.
Will this effect the overall price of the D|Focus? Probably not. It looks like these will cost much less than the current gears I am ordering, but the initial tooling cost is very high. For now, let me just reassure you all that I am committed to offer the affordable follow focus solution.
All current orders will ship with the current drive gears. However I will have a lot of these new gears made and will probably be able to make them available for a very low cost to existing customers.
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