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Unanswered Questions

628 questions with no upvoted or accepted answers
9 votes
2 answers
569 views

Can any MFT lenses be turned into a practical object-space telecentric macro lens by reversing?

The micro four thirds specifications originally want lenses to be image space telecentric if possible. It seems that some MFT lenses actually follow that recommendation. Can reversing such a lens ...
6 votes
0 answers
3k views

Issue with Yongnuo 568EX flash on i-TTL mode

I've just received 2 pieces of Yongnuo YN568EX for my Nikon D610. When I’m on I-TTL mode the flash fires but the image is black (I tried it on each mode: auto, manual, A…), the sound tick-tick twice-...
6 votes
1 answer
2k views

How can I use the 200 seconds exposure time in Raspberry Pi HQ camera?

I would like to use the Raspberry pi HQ camera for astrophotography. I have read in the answers and comments on this question that I should be able to use a maximum exposure time of 200 seconds. This ...
5 votes
0 answers
765 views

Differences between DCP and ICC profiles?

I am trying to understand what is the best colour profile that I can generate from a ColorChecker for calibrating my camera. I always used ICC colour profile standard but now I saw also DCP colour ...
5 votes
0 answers
249 views

Built-in Canon R5 intervalometer not triggering with back button focus

I was trying to use the built-in intervalometer on the Canon R5 last night, and at first set-up the shutter wasn't being triggered. I played around with settings for a bit, flipped the lens to Manual ...
5 votes
1 answer
258 views

Auto mass transform in Lightroom

I have been using Lightroom to mass develop my photos recently and all the tools work as expected when using automatic functions (e.g. auto WB, auto tone), that is setting an auto value will set it on ...
5 votes
0 answers
1k views

How to embed ICC profile in DNG so darktable will use it?

I am experimenting with linear raw DNG and ICC profiles with Darktable. The DNG files are the result of scans using VueScan. I can add the scanner's ICC profile to the DNG. But when I open it in ...
5 votes
2 answers
561 views

Adjust manual focus for sharper images with Sony RX0,for aerial photography

I am taking photos around 80m altitudes (with Sony RX0) with a moving drone,Shutter Speed is set to 1/1000 to prevent blurs,I want to take sharp images with manual focus,how should I adjust settings ?
5 votes
0 answers
490 views

How to disable automatic cropping that's done after distortion correction in DxO Optics Pro 9 or 10?

DxO uses so-called "modules" that apparently contain many lens parameters and they are implicitly used for correcting geometric distortion, and some other issues in pictures automatically. ...
4 votes
1 answer
200 views

How to use JPG embedded in RAW for color calibration in darktable

My camera (Canon EOS R5) does a great job with colors for the embedded JPG, but I am unable to achieve similar colors (mainly skin tones) when processing the RAW version of the image in darktable. I ...
4 votes
0 answers
74 views

Is the Canon radio wireless flash system the same in every country?

Is the Canon radio wireless flash system the same in every country? I'm looking to use several Canon "RT" flashes, some bought in the UK and others bought in the US. Will this work, or ...
4 votes
1 answer
266 views

What lens would suit an A4 large format camera

I'm planning on building a scanner camera. The principle of which is simple: everything's built like a large format camera, except the film is a simple scanner controlled by computer. Now, building ...
4 votes
2 answers
621 views

Does the Interval Timer on the Z6 (or Z7) automatically disable after each sequence/series of shots?

I have the Canon RP and am disappointed to find that the Interval Timer disables itself after each sequence and must be re-enabled for every new sequence. So, every press of the shutter requires ...
4 votes
0 answers
71 views

PanoTools Scripting

I have a series of microscope images that I'm trying to stitch together. In all cases the images are made by horizontally shifting the stage. Autostitch does an absolutely wonderful job. ...
4 votes
0 answers
143 views

Software for detecting orange dates on 4x6" photo prints and adding to metadata

Is there any software that will detect (e.g., OCR) the orange date timestamps burned into 4x6" snapshot prints and automatically add the date EXIF metadata? Would be interested in options either baked ...

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