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Showing content with the highest reputation on 12/16/2013 in all areas
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SLR Magic 17mm T1.6 in DA HOUSE ! :)
yannis.zach and one other reacted to Sebastien Farges for a topic
I've just received the final version of the SLR Magic 17mm T1.6 ! FULL RESOLUTION ON MY FLICK'R http://flic.kr/s/aHsjP5jhLd Here is a sample at full aperture on OM-D E-M5 :) (first in small version, second in full)2 points -
Feature Film Shot on GH2
Axel reacted to austinmcconnell for a topic
I shot this feature on a GH2 this summer. It will be out at the end of January. Here's one of the trailers.1 point -
What aspect ratio/resoloutions for 1.5x
Gábor Ember reacted to Sean Cunningham for a topic
V * AR * 1/SQ V= Vertical Resolution AR = Aspect Ratio (flat) SQ = Squeeze Factor So, for instance, if your target was 1080 lines of vertical resolution you would multiply that by 2.35 to get 2538. That would be your target, flat, widescreen image (2538x1080). To get to the squeezed horizontal resolution you multiply this by the reciprocal of the anamorphic lens compression ratio, 1/1.5 (use full precision on calculator) so that's 1692. 1692 x 1080 Knowing this squeezed aspect ratio makes it theoretically easier to arrive at a shorter calculation but you'll find that the mix of single, double and greater decimal precision at different steps can alter the result by several pixels, introducing quite a bit of slop. For instance, the above resolution works forward and backward through the original calculation, proving it's correct. That's not the case, however, if you were to use the aspect ratio of the frame we know to be correct. If you were to use the aspect ratio of the squeezed frame and the common accuracy of only two digits of floating point precision you would get the following: 1692 / 1080 = 1.57 ...a 1.57:1 aspect ratio for the squeezed frame. But that aspect ratio does not give you correct results, even for our starter 1080 lines of vertical resolution example: 1080 * 1.57 = 1696 ...and... 1696 * 1.5 = 2544 ...but... 2544 / 1080 = 2.36 Not a huge deal but it's something to be aware of, particularly if you're doing something for a client or for eventual DCP or any other application where "close enough" isn't good enough. When you really want to know use as much real information as you can like actual pixels, known compression ratios, aperture measurements, etc. and stay away from aspect ratio and crop factor short hand.1 point -
SLR Magic 17mm T1.6 in DA HOUSE ! :)
Sebastien Farges reacted to Andrew Reid for a topic
Nice cat :) Will you by trying it on the Blackamgic Pocket Cinema Camera? (The lens that is, not the cat)1 point -
wow. I am impressed. Actually I am on my way to get me a A7 cause here in Tokyo it's around 900EUR. (body only). How did you like to shoot with that cam? How could you judge the sharpness on that stretched image? It would be a dram come true if one day you could set the correct aspect ratio on a consumer cam.1 point
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Follow Focus for older anamorphics that move in and out
Lucian reacted to QuickHitRecord for a topic
There's a seller on eBay (helicoptersean) who prints custom delrin focus gears. Here's one of his listings: http://www.ebay.com/itm/Custom-Focus-Gear-Ring-for-Sigma-50mm-F1-4-Lens-/261286581672 He has now made two gears from spec for me that are much wider for use with anamorphic lenses. I've been pleased with the quality and the price (around $30 per custom gear). If you want to contact Sean directly, his email is helicoptersean@gmail.com.1 point -
Speedbooster + Sigma + ND fader - do I need a bigger filter?
Axel reacted to Guest for a topic
Also remember that the glass on fader ND's is usually about one filter size larger than the thread size (to avoid vignetting). And if you're concerned about size at all, the 82mm Genus is going to be massive! Is it the Genus Eclipse you are going for? AFAIK they are the best ...1 point -
Nikon V1 - shooting 4K 60fps raw for $200
Loma Graphics Oy reacted to timpy for a topic
http://youtu.be/m8NKvHR1Kqk1 point -
A couple questions about the Sankor
yannis.zach reacted to Chris Elkerton for a topic
Sharpness when shooting anamorphic is relative. It's not pin sharpe at F2 but it not too bad. F2.8 is perfectly usable in my option. For me F4 is very sharpe, but your prime will have an impact on this. Check out this video I shot with mine. Low light so it's shot between F2 and F3.2. Should give you a good idea if what to expect.1 point -
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