Pentax 6x7 Lenses, Price Hack

[gbeal]

A couple of lenses well suited to wide-field imaging. Both initially designed for the Pentax 6x7 cameras. This means the lens quality area is much larger than the usual chip sizes.

Pentax 200mm f4, caps front and rear, excellent condition, lens body shows some use. AU$300 ONO posted.

Pentax 300mm f4, caps front and rear, although the front cap is an after market-non-Pentax cap. Same condition as the 200/4. AU$375 ONO posted.

I have used both with an e bay Pentax 67 to Sony adaptor. I have modified this adaptor to also give a T thread if you remove the Sony bayonet ring, so in my case I have been able to use a Starlight Xpress CCD and CFW on the rear. Adaptor has an empty 48mm filter ring glued inside, to allow a 2" filter (UV/IR usually) to be in the optical train. Tripod foot has had a couple of screws fitted too, to strengthen it. No it isn't pretty and new, but it works, and well.

Via PM please.
Gary

[gbeal]

Let's slash the price on these.
200/4 AU$200.
300/4 AU$300
Split the postage, but it will be minimal and actual anyway.
Open to suggestions (polite suggestions) with the adaptor. I have a buyer for it if nobody wants it, but I want to sell it last, after the lenses are spoken for.
Gary

[Tandum]

gary, do ya know the back focus on these?

[gbeal]

Hi Robin,
no, don't to be honest.
Why I went this way though in the first place was that most 35mm designed lenses are looking at "about 44mm" or so, and it only takes a fat CFW and deep camera front surface to chip, and the 44mm is blown. This is old news.
The medium format lenses on the other hand have significantly more distance from rear of lens mount to focus, and it was a matter of tapping into this.
That coupled with using the sweet spot in the centre of the lens design made it a no-brainer.
Given the slash of prices, it would appear that one is spoken for, and possibly both. Time will tell.
Gary

[gbeal]

Sold thanks.