Suman Vajjala

Hello Bill and Mark, I have performed another analysis yesterday. My parameters are: ISO 400 and 180 sec. In hindsight, I should've taken ISO 1600 as that was one of the parameters chosen for the ...

Hi, The long exposure raw file showed an EXIF temperature of 45 C and I had taken about 7 photos prior to that. The ambient temperature was not hot on that day but I noticed the LCD screen to be warm.

Hi Bill and Mark, Thank you very much for the explanation. I understand a little bit of why its happening. The number of pixels creating the secondary hump is ~2000-4000. Is there a way to quantify ...

Hi Mark, Thank you for the reply. Is there a reason for the secondary hump in the histogram? Regards Suman

Thank you, Bill. I took the photo in a well lit room so there could have been some leakage of light. I will try this in a dark room. When doing these test should I turn live view off? I have seen ...

Bill, thank you for the clarification. Please find below the histograms with the black level disabled. The first image is in the linear scale and in the second, the y-axis is in log scale. These ...

I know why I see a bluish cast in DPP. I have turned on the underexposure/overexposure indicators. Apologies for the misinformation.

Bill, the y-value in the raw histogram is in log scale. I did that to see the distribution. In the linear scale I could not see any levels. I wanted to ask you about the BlackLevel subtraction. I ...

Hi Bill, I did not understand what you meant. Can you kindly elaborate about it? I took the photo with the lens cap on. However, there was a filter attached to the lens. Could it be that the lens ...

Hi Mark, Thank you for your reply. I will do the test with LENR and check the image. I haven't used the camera for astrophotography yet. I will use it for some time for astrophotography then I will ...

Hi Mark, In DPP, the image looks bluish so I thought the image looks suspicious. I used the camera briefly before taking the 300 s exposure. In hindsight, I should have taken the long exposure ...

Hello, I have a Canon EOS RP and I am interested in using it for astrophotography. I have just shot a 180 sec exposure at ISO 1600 with the lens cap covering the lens in order to understand the ...