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Scott - some observations on your calculations:

1. Your calculations are actually in lines/mm, even though you say lp/mm - lp/mm means line pairs per millimeter, and 60 line pairs per mm requires...

I'd love to be involved too - but I travel frequently and may not be always available. Please add me to the list too.

Yes! I second that - but Ken, did you learn Sanskrit? For those familiar with language theory, it is a CFG that can be easily described with a Backus Naur (perhaps Panini Backus) form. What more can...

First of all, by definition, an investment is supposed to yield a return; even if you do not sell it. Thus, when a professional photographer buys a camera that he uses to earn money, his purchase is...

That said the Imagon 300 was designed to give a certain amount of haloing at each setting on a 57 camera. Used on a smaller or larger format at that same disk setting will lead to too much or too...

Er, maybe this has been pointed out before, but you can accomplish back tilt by tilting the front standard and then tilting the entire camera in the reverse direction until the front standard is...

It would be an interesting project to convert it into a working camera...

Well, I still have a few favorites:

1. Sax and Violins on TV
2. 24 Carrot Ring

Both from an old 1980s issue of some Aussie photo magazine. Was an article on Pun-o-graphy if I recall correctly.

I would hope that the designers of lenses for LF cameras ensure that the "focal surface" approaches a plane - it would be nightmarish doing Scheimpflug with curved surfaces.

And one more thing: there are little nylon pieces that are used to friction clamp the different movements in the F2; these can wear down, warp and even break, causing a less than secure fit. What you...

Is your film the same? Are your holders the same? Although the possibility is remote, it could be that you changed film or holders and now the film is not seating in exactly the same place as the GG....

Eric - OMG - add amnesia to that list; I am sure the mere mention of Ebony made me forget priapism... :-) :-)

I am mildly allergic to the RW45, and quite severely to the SV2024. My symptoms are tachycardia, pyrexia, ptyalism, hyperhidrosis, tumescence and vasocongestion. Sometimes all these symptoms and...

Like a height scale... do you want frontal and profile views too? (Sorry, couldn't resist after Brian's post).

Then there is the Apo Sironar W 210mm f/5.6. It gives you about 50mm of rise or so. It is also fairly light, and if you use the 210 SSXL as a reference, also pretty compact. Of course, that is all...

There are essential differences between the last price spike in silver in the late seventies and now.

Firstly, then the Hunt brothers wanted to corner the silver market, now the demand is...

What seems to be missing from the above posts is perhaps what Kodak already knows: there seems to be a supply-demand discrepancy in physical silver. Silver already rose in price from around $4 per...

If you think the 155 is heavy, wait till you hold a 200 f/6.8 Grandagon in your hands. It makes a Copal 3 shutter look small.

Bravo, Mark. While you are experimenting with film, if I may offer a suggestion; please try Kodak's Ektachrome Professional Plus (or EPP as it is known in the parlance). It is also available in...

Rodenstooooooooooooooooooooooooooooooooooooooooock

.....

Schneiderrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrrr

(With apologies to Even Stevphen)

Oh, I buy Apo Sironar S lenses simply because I love their acronym (ASS) - for my photography, MC Geronars are good enough. But seriously, more than absolute resolution, it is usually flare control...

Rodenstock, no question.

I would not recommend Goof Off; it can dissolve plastic.

Now I agree with you fully, Leonard. The relations I had put forward earlier for the concept of perspective to make sense are implied by your explanation.

Leonard, explain then why the image of anything that is out of focus is larger than the image when the object is in focus, regardless of which side of the plane of sharp focus the object lies.
...

Wow Jerry - TeX and pdfTeX on this forum - I thought few outside the scientific/engineering community ever used it.

Anyway, with all this talk about nodal points and entrance pupils, could we go...

Exactly what Neal said. Need to quantify these "tests" from an information content point of view.

Jerry - let us define perspective first: Take two objects (for simplicity, two lines of the same length suffice) of the same size at two different distances from the image plane. Perspective is...

Finally a math problem on this otherwise dull and mundane forum (sarcasm alert) ... but no Jerry, your math is surely wrong - a 280 on 8x10 cannot equal 180 on 4x5 - for you see, 8x10 is exactly 2x...