Bessa R2A, Done adjustment but how to test?

[Mabster]

Hi there and good evening folks.

Noticed my rangefinder was slightly off today so I went about adjusting it.
I set it to infinity and used a building a good few miles away. It seems ok but I haven't checked against calibrated distances.


I'm due to test it tomorrow and have a few questions.

In regards to testing it for close focussing shall I mark out a range and test the focus at each point: 0.7, 0.8, 1 etc.
I'm thinking of marking out distance markers on paper taped together up to 3 meters.

I suppose I won't truly know if its focusing right until the film is developed?
However, tomorrow I will set the camera down, and check the focus on the RF patch and see how it looks.

From here I'll take say three photos of each distance with different apertures and then check once developed?

Also what apertures should I be using for the test? I can put three rolls through.
Much of my shooting will be 2.8-5.6 but often at 1.4

Thanks in advance and thank you for all the great advice that's on this forum.

Mabs

 

[aldobonnard]

infinity readjustment should be enough, I wouldn't touch the close focus but let this to a pro.
for a film camera, what you should do is place a transparent on the focal plane, and check that your target comes in focus.
Otherwise, as you said, take a few pictures of a vertical target, vertically, and also of another target (eg a ruler) but this time with some angle, so that you will be able to determine any front or back focus.

 

[payasam]

The thread "Measuring focus distance on a RF" has some of the information you want. For focus testing, whichever lens you use should be at its widest aperture, because that is when depth of field will be least.