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What is the difference between the 4990 and the 4990Pro? I read B&H spec/features tab and the descriptions are identical; but the price is about $75.00 different. Thanks

The Red Dot Artars have an angle of coverage of about 46 degrees. I own several including the 24" and a 35". My measurements indicate an image circle of 516mm for the 24" and 771mm for the 35"....

I seem to recall somewhere that using filters on the rear element of a large format lens produces some undesired result. Any one have any expeirence using filters mounted behind the lens? Whats the...

I'm pushing for re-birth of their Series VIIb lens.

There was an idea put forth here some time ago about carrying heavy/bulky loads. A lot of ideas were tabeled, some funny, some interesting. Their consensus best suggestion was a 'joggers baby...

Any suggestions on where the best values are right now on buying mat board. The freight cost are getting ridiculous from Light Impressions. Thanks for your suggestions.

Does anyone have a copy of a Schneider catalog which shows the weight of this older lens? I know it is f8-90, covers 500mm@f22, and was dis-continued when the 210Super XL was brought out. I'm...

I agree with Bob. I tried to sell my 184 with color head for 3 months. Never got a 'sniff'. Couldn't get $1000.00 on eBay. Ended up donating it to the local high school, they gave me a tax letter (I...

I have Phil's latest library of film curves and he suggest for Contrast Index 0.52 @ 70 deg F as follows: DDX @ 1:6 = 7.0 min; or Xtol @1:1 = 6.5 min

Michael: Thanks for the lead, their (S I Howard) website is loaded with possibilities.

Joe: You are looking at the same situation I am. Surely some plane on/above the platen glass is "THE" best...

I'm looking for a source of thin plate/sheet glass. Something as big as 8x10 to as small as 4x5. With regards to thickness; 0.100" (2.5mm) or as close as I can get to it.

Stephen Shuart use to...