Hello and thanks for having me as a member. I am a real photonoob, just starting to learn so please bear with me.
I facet gemstones and am having a fit trying to photo them.
I just got a set of 3 extension tubes, no name brand, they fit and seem well made. All aluminum with matte black finish, probably anodized. But when I put any combination of tubes on the camera I get this array thru the viewfinder.
Doesnt matter if its turned on or not, doesnt matter what I aim it at, its always there. It still takes pics fine, but rather hard to focus with this in the way.
There is a center dot, always red, surrounded by 6 white dots, then the rest kind of grey/bluish. All in a perfect honeycomb pattern. It only shows up with the ext. tubes, with either one of my 2 lenses. Looks to me like a multiple reflection of the aperture opening.
I took the gem picture below with the pattern in the way. Not too bad, but the stone is the size of a penny. For small ones I cant tell if its focused because of all the visual interference from this pattern in the viewfinder. Kind of like looking thru a wet screen.
Again, the camera works just fine without the ext. tube or tubes. Mirror clean, nothing loose.
I will stop rambling now and wait for some hopefully professional advice from you guys and girls.
Nick, Stuck in SC
I facet gemstones and am having a fit trying to photo them.
I just got a set of 3 extension tubes, no name brand, they fit and seem well made. All aluminum with matte black finish, probably anodized. But when I put any combination of tubes on the camera I get this array thru the viewfinder.
Doesnt matter if its turned on or not, doesnt matter what I aim it at, its always there. It still takes pics fine, but rather hard to focus with this in the way.
There is a center dot, always red, surrounded by 6 white dots, then the rest kind of grey/bluish. All in a perfect honeycomb pattern. It only shows up with the ext. tubes, with either one of my 2 lenses. Looks to me like a multiple reflection of the aperture opening.
I took the gem picture below with the pattern in the way. Not too bad, but the stone is the size of a penny. For small ones I cant tell if its focused because of all the visual interference from this pattern in the viewfinder. Kind of like looking thru a wet screen.
Again, the camera works just fine without the ext. tube or tubes. Mirror clean, nothing loose.
I will stop rambling now and wait for some hopefully professional advice from you guys and girls.
Nick, Stuck in SC