RD-1 Rangefinder Infinity Adjustment

[Gid]

Sorry to revisit old ground, but I have a specific query relating to this that I haven't seen covered in the other threads - may just have missed it, there are so many.

I have had the hot shoe cover off and sucessfully (?) adjusted vertical alignment and infinity focus (?).

My question is - how far is infinity (no philosophical replies please unless they are really entertaining)? That is, if I want to get the images to align on the infinity mark how far away should should the subject I'm focusing on be? I did see one post that suggested 300 feet.

Your help will be appreciated very much.

Thanks

Gid

 

[pab]

infinity is sometimes reckoned prcatically speaking to be 1000 X the focal length of the lens e.g. infinity for a 100 mm lens is 100 m (300 feet).

 

[daveozzz]

I read somewhere (and tried it and it seemed to work) you can simulate infinity by drawing 2 parallel lines on a piece of paper which are EXACTLY the same distance apart as your baselength - which on a RD-1 I believe is 38.2mm.
Then when you point at the paper (say 1m away) infinity as far as the rangefinder is concerned is when both the lines converge and that should correspond with infinity on the lens barrel.

Now idea how accurate you'd have to be with the lines but was an interesting technique I thought.

 

[pfogle]

I read somewhere (and tried it and it seemed to work) you can simulate infinity by drawing 2 parallel lines on a piece of paper which are EXACTLY the same distance apart as your baselength - which on a RD-1 I believe is 38.2mm.
Then when you point at the paper (say 1m away) infinity as far as the rangefinder is concerned is when both the lines converge and that should correspond with infinity on the lens barrel.

Now idea how accurate you'd have to be with the lines but was an interesting technique I thought.

Nice idea!

For practical purposes, infinity is far enough that the distance from your target to 'real' infinity (let's say the moon, for example) is well within your depth of field at full aperture.

I like to use an apartment block a few hundred meters away at night; the lights are easy to see and to line up exactly.

Phil

 

[Gid]

Thanks

Thanks

Thanks Guys. It looks like I have to do a bit more adjusting. :bang: Still, practice makes perfect - I hope.

Regards

Gid