Mount it on the camera and look through the front of the lens to see if the aperture is open. Given that it is used, you just bought it, and it is malfunctioning in a manner that could not be caused by user error - that's a strong case for immediately returning it.

Good luck!

Mark

On 6/4/2015 6:35 PM, Eric Weir wrote:
Picked up my 16-45/4 from KEH today, put it on the camera, and I’m totally 
baffled. When I look through the viewfinder it’s very dark, almost black. With 
the lens wide open I can barely make out objects in the field of view only when 
pointed directly at a strong light source. And I can’t actuate the shutter. 
Replacing the 16-45 with a 35/2.4 I have absolutely no problem.

I feel really stupid, but i have no idea what’s going on. Any clues?

------------------------------------------------------------------------------------------
Eric Weir
Decatur, GA  USA
eew...@bellsouth.net

“...we are a form of invitation to others and to otherness..."

- David Whyte




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