- Joined
- Jul 14, 2011
- Messages
- 13,928
- Format
- 8x10 Format
I was aware of this - especially with Pentax, as the difference between SMC and the immediate predecessors seems not to have been single vs multi-coating, but rather multicoating vs an evolutionary step in multicoating.
The EBC from Fuji just stands for Electron Beam Coating, which is a method of deposition-assist that inproves the compaction of the layers and hence the durability against abrasion and damp. It did also happen to coincide with a move to multicoating or improved multicoating as well.
These methods ( Ian-Assisted Deposition being another variant ) are standard in recent years.
Mark I don't remember ever coating lenses,
You and I had a conversation about this last June here: https://www.photrio.com/forum/threa...ompur-184mm-wray-lustrar.200008/#post-2695279There's a big difference between ceasing manufacture and assembling what's left from stock. A more recent example is Schneider who had a large over-stock of unsold late Xenar cells, that's the 150 f5.6, 210, f6.1., & the 300mm f6.3, as well as G-Clarons. These were assembled and 2000 and sold at discount prices, these had contemporary serial numbers, bu tit's known the cells were made some years earlier.
Then there's lenses like the 184mm f4.5 Wray Lustrar introduced in 1953 and fitted in a Dial-set Compur #2 with flash sync. Were these shutters surplus stock ?
Ian
You and I had a conversation about this last June here: https://www.photrio.com/forum/threa...ompur-184mm-wray-lustrar.200008/#post-2695279
... and were both left wondering if these dial-set Compurs were "new old stock" that survived the war or if Deckel made new ones after the war. Again, Arne Cröll did not comment on this in the reference that I cited in my post #2.
Again I highly recommend Dan Fromm's piece on Ilex (see above, my post #41) to anyone interested in the industrial history of U.S. made large format lenses.
David
The whole genesis of that lens seems to link up with Linhof launching a lighter weight 8x10 monorail specifically aimed at the emergent 8x10" Polaroid market.300mm f5.6 Symmar was in a smaller and better Compur #3
both left wondering if these dial-set Compurs were "new old stock" that survived the war or if Deckel made new ones after the war.
I’m learning a lot by listening to you guys chit-chat! (I hear you talking in my head.)
The whole genesis of that lens seems to link up with Linhof launching a lighter weight 8x10 monorail specifically aimed at the emergent 8x10" Polaroid market.
Were they #1 or #2 Compurs? Found a reference very recently (a Burleigh Brooks catalogue from 1957) which specifically refers to "This new rim-set Compur II has T-setting which does not have to be cocked" which suggests that dial set Compur #2's existed up to somewhere close to that point.
Well as David Lindquist mentions I posted a thread about the 184mm f4.5 Wray Listrar I bought last June, which is in a flash sync dial set Compur II. The lens is in the 1953 BJP Alamanacwhich was published December 1952. I was asked about the serial number, which I thought unreadable however it;s only 6 numbers and starts 7, I stuck an 85mm lens on some extension tubes and here's the surprise,
View attachment 362643
The serial number is for 1926, so old stock pre-WWII Dial sset Compur II shutters being used in the 1950s.
Ian
Ian, P-H Pont's Deckel chronology puts 751103 in 1950.
Cheers,
Dan
It can be the edge of the rear lens cell as reddesert has said, or the distance from the centre of the rear optical surface to the image. It depends what sort of datasheet or part of a datasheet you are looking at .What the heck is the reference point for "back focus?" the rear lens cell?
Ian, P-H Pont's Deckel chronology puts 751103 in 1950.
Cheers,
Dan
I strongly suspect the changeover happened somewhere around the Symmar design change/ the launch of the 150mm Xenotar and just before the end of the 150/3.5 Xenar (as I've seen the latter in a new-style Compur II).
Are you sure Dan, the 1950 Compur serial numbers are in the 7 million, 1926 serial numbers 750 thousand.
Not sure if this helps the conversation or not, but a dial-set Compur that appears to have ben original to my 1940/1941 Anniversary Graphic is numbered 723806 (and is centered)
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