Ad for Octanar also looks to be a 4+4
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Type: Posts; User: fabphoto73; Keyword(s):
Ad for Octanar also looks to be a 4+4
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Here is an ad from 1910 British Journal Photographic Almanac. Looks to possibly be a 4+4 symmetrical although LVM says it's a 3+3.
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Recent acquisition - No. 2664 - 10cm in height. 4.2cm glass(3.9cm visible) 164mm F4.2 - covers 5x4” format without the cup stop(some vignetting with). ‘2564’ rice writing on both sides of front...
This may be of some interest from a 1860 Photographic Journal: An excerpt of correspondence between Thomas Grubb & Thomas Sutton regarding his Aplanatic lenses. Mr. Sutton refers to a photographic...
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Here are two that don't appear to be on the list. Stereo pair 907 & 908. Not mine and can't remember the source.
A clearer image of the above mentioned lens - No. 2467 - 1/2 Pl. 230mm F4.5. Rice writing on both sides of front achromat and on one side of both rear elements. Also Lerebours Et Secretan etched on...
Recent acquisition - Serial No. 5201 - 1/1 Pl. 310mm F4 edge etchings on both sides of front achromat and on one side of both rear crown & flint glass.
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A rather small J.F.Shew Serial 6034 petzval design with rice writing-serial number on front doublet and on both rear elements. focal length 90mm speed f3 approx.
Yes 1875 according to the source (google books). Here's an even earlier one from Joseph Solomon Catalogue 1861.
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Here is an advert for Grubb that lists the B3, from a Richard W. Thomas Catalogue c1875
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Plasticca 400mm F4 (missing yellow filter) Sold yesterday on Ebay for 350usd buy it now! https://www.ebay.co.uk/itm/352703065787 I missed it by a few seconds! Arrggh! Would have been nice to compare...
I have a B2 petzval No.1560. Focal length is 9" (back focus is 7"). It's pretty fast F3 approx. I looked at a B3 petzval a while back, I almost bought it but then noticed the focal length was around...
Early Cooke Portrait Series II 8 1/2 x 6 1/2 inches Eq. Focus 13 inches Serial No. 15025 'unscrew three turns for sharpest definition' (rear element)
Mine is a IIE 12.75" f4.5 Knuckler S/N 219569