Cale Arthur
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I’ve noticed recently that, at a distance of about ¾ of a mile (apx. 1200m), the distance (horizontal) image is slightly out of alignment on my S2. It’s not horribly out, just enough to appear slightly ‘fuzzy’.. in other words, not as aligned as it seems like it should be. I’m assessing this based by fairly primitive means, ie Chicago city blocks, which i’m positive isn’t the most accurate way to determine this type of thing, but hey.. it’s what i’ve got ‘on me’ at the moment. 
In a thread on this subject here, I remember Jon Manjiro saying that the images should be aligned at 1k meters, or thereabouts (sorry if i’m misquoting you, Jon), and in that same thread, Fred K said that if the images were not aligned horizontally, that one’s images would not be sharp. So, I guess my question is this: what’s the ‘deal-breaker’ distance for rf alignment in this case, and can someone elaborate on the nature of how this ultimately affects image sharpness? I’m having a difficult time wrapping my mind around how this works on a scientific level (eg, if the rf is out at infinity, are the rest of the distances ‘shifted’ back as well?), so any help would be greatly appreciated. I’m sure this is basic knowledge that I should know, but I can’t seem to dial it up.
I’m going to run a quick test roll later today, in an effort to confirm any on-film anomalies, but just wanted to get a head start on this.. thanks much, and hope everyone is having great holidays!
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In a thread on this subject here, I remember Jon Manjiro saying that the images should be aligned at 1k meters, or thereabouts (sorry if i’m misquoting you, Jon), and in that same thread, Fred K said that if the images were not aligned horizontally, that one’s images would not be sharp. So, I guess my question is this: what’s the ‘deal-breaker’ distance for rf alignment in this case, and can someone elaborate on the nature of how this ultimately affects image sharpness? I’m having a difficult time wrapping my mind around how this works on a scientific level (eg, if the rf is out at infinity, are the rest of the distances ‘shifted’ back as well?), so any help would be greatly appreciated. I’m sure this is basic knowledge that I should know, but I can’t seem to dial it up.
I’m going to run a quick test roll later today, in an effort to confirm any on-film anomalies, but just wanted to get a head start on this.. thanks much, and hope everyone is having great holidays!
--c--
Cale Arthur
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Thanks for the insight, Fred.. always appreciated! I guess i should have mentioned that i'm not concerned about the focus at the more extreme distances, but rather how a minor misalignment when at the infinity mark (on the helical) would translate at every other distance.
I'm off to shoot a test roll.. guess i'm going to have to use some Fuji Minicopy (iso 6), since it's the only thing i have that i can use to shoot wide open on a sunny day! We'll see how it goes..
--c--
I'm off to shoot a test roll.. guess i'm going to have to use some Fuji Minicopy (iso 6), since it's the only thing i have that i can use to shoot wide open on a sunny day! We'll see how it goes..
--c--