Whats wrong with my DSLR?

8 replies156 views
Leonard Kascak avatar
Hi everyone, I bought full spectrum canon 450d and I can’t use it with objectives. Every time I shoot with objectives I got image like this one. Please tell me what’s wrong with my camera or how to fix it. Thanks for advices.
andrea tasselli avatar
Test it on the Moon and see wheter you reach focus and how well. That would be the first check. When you talk about "objectives" you mean photographic lens of the normal kind used in daylight or is it something else?
Leonard Kascak avatar
I have Stock Canon objective 18-55mm but i had tested one 200mm Tamron too and get the same results.
andrea tasselli avatar
What were you shooting at?
Leonard Kascak avatar
This one is foto of closed objective but at first i tried Milky way and same thing happent.
andrea tasselli avatar
Basically you are telling us that no lights reaches the sensor. Have you tried using it for daytime subjects?
Leonard Kascak avatar
Yes, no light reaches the sensor. For daylight, i havent tried it yet.
andrea tasselli avatar
I suggest you open the diphragm at its maximum and use ISO1600 for any night-time target. It is also a good idea to test the basic functionality of the camera in daylight. Moon shot to test focusing.
Leonard Kascak avatar
Thanks for advice i’ll try it.
Related discussions
To make things clear...
Ok, I finally got the optolong clip-in filter for my ff camera (canon 6d) and I have a really stupid question, but it's been bugging me for quite some time. (I apologize in advance for my bad translation ahead) When installing, you lock the mirro...
Author has full spectrum Canon camera; candidate discusses clip-in filter for Canon FF camera.
May 7, 2025
Bayer-like checkered pattern on mono subs
Hi everyone. This started happening about a week ago: I have this checkered, debayer-like pattern all around my subs, even though I’m using the ASI1600MM, which is a monochromatic camera. The pattern is gone if I zoom in or out a little bit. It’s sti...
Both involve unexpected visual patterns appearing in camera images during astrophotography.
Oct 5, 2025