Cadmium Posted January 23, 2017 Share Posted January 23, 2017 I am curious if anyone here has had a camera converted to full spectrum that had no built-in anti-aliasing (AA) filter in its stock camera form.Here is a chart listing various camera models that are made with no AA filter. http://www.outdoorph...wpass/chart.pdf Here is the parent page link:http://www.outdoorph...go-no-low-pass/ Thanks :-) Link to comment
Andrea B. Posted January 23, 2017 Share Posted January 23, 2017 I have a converted Sony a7R. Link to comment
Cadmium Posted January 23, 2017 Author Share Posted January 23, 2017 Does it focus well? Who did you have convert it? Link to comment
Andrea B. Posted January 23, 2017 Share Posted January 23, 2017 The a7R was a MaxMax conversion. It focuses just fine.It is easiest to focus the a7R in UV by using Live View. Focus peaking works sometimes in UV but may not work if the subject is a UV-absorbing flower shot close-up. Link to comment
Andrea B. Posted January 24, 2017 Share Posted January 24, 2017 I would like to add that the Nikon D810 has better Live View than the Sony a7R. And the D750 and D600 seem just a bit easier to focus in Live View than does the Sony a7R. This is a personal observation and may be dependent upon my personal "ergonomics" and such. Steve, I think that a lot of what you are seeing might just be the difference between 16 and 24 megapixels when viewed on the monitor combined with some motion blur due to hand-holding. The classic test is to put the D7200 on tripod, use MirrorUp, focus via LiveView and shoot a brick wall (or a test chart). Then shoot the exact same scene hand-held. Make several photos with each set-up. Look at the two photo sets and determine which ones are sharper. I'd use f/8 for this which is not stopped down enough to have serious diffraction. Try this in both Visible light and in UV light. Link to comment
Andy Perrin Posted January 24, 2017 Share Posted January 24, 2017 The motion blur in the Live View combined with the noise makes it really hard to focus sometimes. Even when there is not much noise in the actual photos, the Live View is noisy. Link to comment
Hornblende Posted January 24, 2017 Share Posted January 24, 2017 I think the Live View boosts the ISO in order to have a correct illumination of the scene. Link to comment
JCDowdy Posted January 25, 2017 Share Posted January 25, 2017 Here is a chart listing various camera models that are made with no AA filter. Add to that list the new Pentax KP, announcement just bounced into my email inbox. Link to comment
aphalo Posted January 27, 2017 Share Posted January 27, 2017 Olympus E-M1 (Mk 1 and Mk 2) and E-M5 (Mk 2 only) do not have AA filter. I an E-M1 converted to full spectrum by DSLR AstroTEC and I have not noticed problems with focusing using EVF, live view on camera, live view on a tablet via WiFi, or live view on a monitor attached to my laptop with the camera tethered via USB. Enrico mentioned in another thread that the Sigma 19 mm f/2.8 MFT objective is reasonably good for UV and that it can even auto focus. I bought one and it arrived today at noon, and as we had a clear sky, I was able to test it with a Baader U-filter. Auto exposure also works nicely. Link to comment
Timber Posted January 29, 2017 Share Posted January 29, 2017 might be wrong but I heard that the hotfilter and the AA filter are sandwiched together in most cameras and once you remove the hotfilter you remove the AA as well. I think that's the case with the Sony NEX 6 I have. How can I test it? This site says on the NX100 they are sandwiched: http://paulrshome.blogspot.co.uk/2012/04/nx100-internal-filters-analysed.html Link to comment
Alex H Posted January 30, 2017 Share Posted January 30, 2017 might be wrong but I heard that the hotfilter and the AA filter are sandwiched together in most cameras and once you remove the hotfilter you remove the AA as well. I think that's the case with the Sony NEX 6 I have. How can I test it? That is true. Find a chicken, pluck some feathers from it and take pictures of these feathers in UV – and you will see the "best" moire there is.... Link to comment
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