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About Subject: Re: My Dream MF Viewer PixDate: 2008-07-26 16:33:53From: Bill G
Hi Don... I wrote you off-list to seek your permission to respond to
your off list post regarding this subject, but your server rejected me
as a spammer.... since their is nothing personal in here, I thought it
would be best to respond in the forum.
viewers, i did make a quick comparison to 35mm viewers..... I am sorry
if I did this on the MF list, does this address your question?
vintage is the film? Modern film? 1960's Kodachrome? I have several
25mm fl lenses which are well corrected.... Velvia / provia f, film
looks spectacular, even at 10x mag. If the optic delivers a non
aberrated view to your eye, film still looks fabulous at 10x.... but
when you see a poor view, often the film is blamed....how does a print
look from good tranny film at 10x? Crappy?
case, and I have excellent vision and use mine on a regular basis.....
to design / build my own optics.... They are nearly diffraction limited
over the entire film radius, producing MTF values over 70% MTF, over
80% of the image area, with less than <1% distortion. I would not
classify this optic as, "less than sharp". Instead, i would classify
it as, ultra sharp. I have only seen a few optics sharper, as they
were designed with a very small FOV.
Bill
your off list post regarding this subject, but your server rejected me
as a spammer.... since their is nothing personal in here, I thought it
would be best to respond in the forum.
> I thought that your discussion pertained to MF viewers, not to 35mm viewers.90% of what I wrote was about MF
>
viewers, i did make a quick comparison to 35mm viewers..... I am sorry
if I did this on the MF list, does this address your question?
> Construction of a 35mm viewer with 29mm viewer lenses is not a problem.Well, I wish someone would do it already??
>
> A viewer with an 80 degree field of view, approximately, was seen in the Leep viewer, though the image was a bit soft, it was a MF viewer.a "bit" soft? OK......
>
> I dop have a 35mm viewer with 28mm viewer lenses, but current color filmor, maybe its the optics? what
> is too fuzzy to provide a decent stereo image, at that magnoification.,
> in my opinion.
>
vintage is the film? Modern film? 1960's Kodachrome? I have several
25mm fl lenses which are well corrected.... Velvia / provia f, film
looks spectacular, even at 10x mag. If the optic delivers a non
aberrated view to your eye, film still looks fabulous at 10x.... but
when you see a poor view, often the film is blamed....how does a print
look from good tranny film at 10x? Crappy?
> In my estimation, a 80 degree MF viewer would have a similar result, a less than sharp image.I can assure you this is not the
>
case, and I have excellent vision and use mine on a regular basis.....
> Why would anyone want a less than sharp stereo image ?I agree Don, hence why I was forced
>
to design / build my own optics.... They are nearly diffraction limited
over the entire film radius, producing MTF values over 70% MTF, over
80% of the image area, with less than <1% distortion. I would not
classify this optic as, "less than sharp". Instead, i would classify
it as, ultra sharp. I have only seen a few optics sharper, as they
were designed with a very small FOV.
Bill