Unanswered Questions

493 questions with no upvoted or accepted answers
7
votes
2answers
342 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 ...
7
votes
0answers
140 views

How to take photos quickly through iPhone using Ricoh Theta SC?

I recently got a Ricoh Theta SC. If I use it standalone I can press the shutter button, it will make a noise to indicate it is taking a picture. Within about 1 second I can take another picture by ...
6
votes
0answers
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-...
5
votes
2answers
292 views

Why is my film coming out so dark?

I have an Olympus AZ -230 Super Zoom 35mm film camera. A roll of film has come out very dark, almost a purple tint. How do I correct this for the future?
5
votes
0answers
206 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
0answers
831 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
1answer
582 views

Calculating EV of an image file using its exif data

I'm trying to calculate the EV (exposure value) for an image file based on its exif data. From the exposure value article at Wikipedia, I am using this formula for calculating EV: EV = EV100 + LOG(S/...
5
votes
1answer
763 views

Why won't Canon EOS 400D turn on?

I have the Canon EOS 400D - also known as EOS Digital Rebel XTi, or Kiss Digital X in Japan - and as of tonight, it stopped working. It won't do anything, with or without batteries or a CF card, ...
5
votes
0answers
655 views

How to continuously store Canon EOS 80D images on a computer over WiFi

The EOS Utility for Canon cameras allows the transfer of images stored in the Camera to a computer running the EOS Utility over WiFi. And this EOS Utility can be configured to transfer only those ...
5
votes
0answers
788 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
0answers
468 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. ...
5
votes
1answer
440 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 ?
4
votes
1answer
215 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 ...
4
votes
0answers
38 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
3answers
134 views

Windows-app to quickly enter iptc keywords

I have scanned thousands of slides. They have no metadata. Is there a windows application to quickly enter iptc keywords for each image? It should be keyboard-driven and have autocomplete suggesting ...

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