K/L 90mm lens for RB67 - focus?

[Rob MacKillop]

I'm finding it hard pinpointing exactly what is in focus and what isn't with this lens - I am in the general ballpark, and things turn out roughly what I was expecting, but it has difficult when looking through the viewfinder - even when using the optional magnifying glass - to determine focus exactly.

First at f/3.5, second at f/5.6, third at f/4ish

Chair I by Rob MacKillop



Chair II by Rob MacKillop



Wild Flowers by Rob MacKillop
​

I'm pleased to be getting much better exposure results these days. The Weston is a lifesaver, and seems to be working as expected. The Zeiss Nettar is in shot, as well as a postcard of an image you might be familiar with! Not great photos, but tests only.

 

[Paul Lange]

I find it hard too to use a ground glass screen but find shinning a bright light on the subject just for focusing helps a lot.

 

[Rob MacKillop]

Never thought of that, Paul, but it's a good idea!

 

[Brian Moore]

I have trouble focusing almost every camera now. Some cameras more than others. (On the Olympus XA I don't even try to focus any more.) Yet I find the ground glass on the C33 a little easier to focus than most of my cameras. (With the exception of my Polaroid 210, which has an odd method for focusing.)

I realize your mind is going, but did you happen to make note of the shutter speeds for the images above?

 

[Rob MacKillop]

No. Of course not. However, I have bought a small notebook and pencil to match, and every shot will have all the relevant info recorded from now on...maybe...if I remember...

 

[Brian Moore]

I have bought a small notebook and pencil to match, and every shot will have all the relevant info recorded from now on

That's a good idea. Glad I thought of it. I think I'll do the same.

 

[Pete Askew]

Are you focusing at maximum aperture Rob?

 

[Rob MacKillop]

Not personally, but the lens is...