IR vs. Rolleinar

[tom_overton]

I'll post this here, but it may probably be better suited to one of the other

threads.

 

I printed a bunch of contact sheets last night. (is anyone else as far behind as

I am?)

 

My first roll of Ilford SFX has some really good shots, a couple of near misses

and some "what the Hell???" Focus is generally good, but apparently SFX is not

very compatible with my Rolleinar. Makes sense... the closer you are, the more

critical the focus... IR focuses on a different focal plane, so you pretty much

have to know what you're doing. I don't.

 

I know that many SLR lenses have an IR focusing mark, but I don't know if that

is the issue here. As I said most of the shots were well focused; it's just the

couple that I did with the Rolleinar that are off. Any hints?

 

BTW, I was shooting with a Rolleinar 2, if that makes any difference.

 

Cheers,

Tom, on Point Pelee, Canada

http://tomoverton.images.googlepages.com

[mike_earussi1]

Shotting at f22 would obviously help some because of increased dof. Also experimenting by shooting a ruler and then seeing just how far off you actually are and in which direction. Eventually you could probably figure it out.

[d_purdy]

You might set up a ruler at an angle and focus wide open with the Rolleinar on at a

specific measurement mark and then process the film and see where the camera

focused at compared to where you thought it was focused at. then you can go back to

the exact same spot with the camera and ruler and see what adjustment you have to

make to make it right.

[tom_overton]

Thanks, Mike and Dennis. That was going to be my next step. I'm thinking that when you combine the razor-thin DOF of macro photography with the already difficult focusing of IR, you'd have to be a pretty patient photographer to get consistent results.

 

Thanks again,

Tom