bodressler Posted July 9, 2015 Share Posted July 9, 2015 Hello, Does anyone have experience with using the Lomo anamorphic primes on the a7s?http://cptrental.com/?post_type=portfolio&p=933 What would I need in order to use them? A PL to e mount adaptor? A diopter? Sorry for for the potentially novice question! thanks! Quote Link to comment Share on other sites More sharing options...
Caleb Genheimer Posted July 10, 2015 Share Posted July 10, 2015 Some Lomos have been converted to PL, some have not. There are two original mounts that they typically have : OCT-18 and OCT-19. It would also be ideal to have rails and a sliding lens support.Remember... They're cinema lenses, not full frame stills lenses, so shoot in APSC mode. Quote Link to comment Share on other sites More sharing options...
dhessel Posted July 10, 2015 Share Posted July 10, 2015 Not if it is a 16:9 sensor readout and you want a 2.4 ratio. When 2x (3.56:1) full frame anamophic is cropped to 2.4:1 it has a 1.5 crop factor(aps-C) in the width so it will not vignette and you can get a wider FOV. Full frame cropped from 16:9 footage you effectively have a 24 mm x 20.25 mm sensor where aps-C cropped would be essentially a 15.7 mm x 13.1 mm sensor after cropping away the excess on the sides. For spherical s35 lenses aps-C is a must but not 2x anamorphics. With the A7s you have the option of shooting FF and aps-C so you get 2 focal lengths out of a single anamorphic prime. I used a Lomo 50mm squarefront on the A7s and that was how I came to realize this as I thought aps-C was a must as well. Quote Link to comment Share on other sites More sharing options...
bodressler Posted July 11, 2015 Author Share Posted July 11, 2015 If anyone's interested here are some test shots with the Lomo Superscope 50mm on the a7s. I couldn't find many on the net. lomo_1243 is the password Quote Link to comment Share on other sites More sharing options...
Russell Anway Posted July 15, 2015 Share Posted July 15, 2015 It's true that the 50mm and the 80mm will cover the full frame sensor, but its also important to understand that the areas outside of the super35 image circle weren't a part of the quality control process. So the image there will be more degraded, sometimes extremely so. My 50mm is basically sharp wide open, but it vignettes significantly between T2.5 and T2.8, but if its on a full frame instead of apsc, the effect is extreme, and obvious to the naked eye. That might be fine in some shots (a portrait or other lock down shot), but panning across a white background at a wide stop on FF would be a grave error.Just something to keep in mind. Quote Link to comment Share on other sites More sharing options...
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