Well, that would be incorrect Vick, CaF2 is somewhat sensitive to temperature changes in terms of its optical behaviour, not to humidity. I actually never had a noticeable focus shift. Have a look at my BLOG to see what can be done with such lenses. Cheers, Klaus ------------------------------------------------------------------------------------------------------------------------ Dr Klaus Schmitt macrolenses.de Institutstrasse 7/2 69469 Weinheim GERMANY Tel +49 6201 1860-50 Fax +49 6201 1860-51 email postmaster@xxxxxxxxxxxxxx ------------------------------------------------------------------------------------------------------------------------ http://www.macrolenses.de for macro and special lens info http://www.pbase.com/kds315/uv_photos for UV Images and lens/filter info http://photographyoftheinvisibleworld.blogspot.com/ my UV diary ------------------------------------------------------------------------------------------------------------------------ ----- Original Message ----- From: Vick Ko To: hasselblad@xxxxxxxxxxxxx Sent: Tuesday, July 20, 2010 9:56 PM Subject: [HUG ] Re: FS: UV-Sonnar 4.3/105mm Arsenal's prices, are, silly So, what are the special uses for the UV lens? How does it do in visible light? I recall that the focus shifts based on humidity, due to the characteristics of one of the internal crystal lenses. Vick On 7/20/2010 3:52 PM, Richard Schiff wrote: I still have the inventory list from NASA on those lenses. If I can find it it will be interesting to see what that serial number was > Date: Tue, 20 Jul 2010 15:35:50 -0400 > To: hasselblad@xxxxxxxxxxxxx > From: marcsmall@xxxxxxxxxxx > Subject: [HUG ] Re: FS: UV-Sonnar 4.3/105mm > CC: hansdegroot@xxxxxxxxxx > > Former Hasselblad pro Mike Fletcher pointed out > to me today that Photo-Arsenal has one listed on > eBay for $14,300 with no bids. Klaus' is a steal at Euro 5,500! > > Theirs is 6888415 for the record-keepers! Klaus > has already sent his number in to the Zeiss Lens List. > > Marc > > > > > msmall@xxxxxxxxxxxx > Cha robh bàs fir gun ghràs fir! > > > ====================================To unsubscribe from this list, go to www.freelists.org and logon to your account (the same e-mail address and password you set-up when you subscribed,) and unsubscribe from there. >