the ones I am using are about $200 used from Adorama.com
they work great.
----- Original Message -----
From: "John R Pierce" <pierce@No-Spam>
To: "The Astronomy Connection" <sf-bay-tac@No-Spam>
Cc: <tac@No-Spam>
Sent: Friday, April 01, 2005 10:50 AM
Subject: Re: [TAC] Question for the SBIG users
> Richard Crisp wrote:
>> I'd strongly recommend using a pentax medium format camera lens instead
>> of using 35mm lenses because you get about 1.5" additional back focus
>> over use of a 35mm lens
>
> OTOH, those Pentax 6x7 lenses are big and heavy. And I sure don't know
> where I'd call them cheap, I've paid around $500 each for the couple I
> have, although I do see some older ones on ebay for more like $200.
>
> If you DO get Pentax 6x7 (older) or 67 (newer, but fully compatible)
> lenses, ones that say SMC or Super-Multi-Coated are preferable to older
> ones that just say Super-Takumar. The Super-Takumar coatings were state
> of the art in the mid 60s, but the SMC coatings are superior. Optically,
> most of these lenses are excellent.
>
> I believe from oldest to newest, the lenses are designated...
>
> Super-Takumar 6x7
> Super-Multi-Coated Takumar 6x7
> SMC Pentax 67
>
> even the f/2.4 105mm 'normal' lens for this camera weighs around 650 grams
> (23 ounces, 1.4 lbs).
>
Received on Fri Apr 1 13:32:07 2005