Originally posted by Fumble Hi, just been out today doing some daytime long exposures - 30 secs +, and yes you absolutely need a viewfinder cap - the whole image gets slightly washed out and there are faint red lines across the entire image. I dont have a cap supplied in the box so I will have to find somewhere in the UK to get one.
Cheers.
Of course
Usually you have an eye covering the viewfinder, or if you don't exposures are really short so not a lot of light thru the viewfinder gets in.
Once the mirror is flipped up, the viewfinder is a great way for unwanted light to enter and hit your sensor.