RE: 645 - 6x7

2005-03-14 Thread Pedro Oliveira

 Are the 645 and 6x7 lenses interchangeable?

 eg: could I use my 105mm for the 6x7 on a 645?

You need an adaptor to put 6x7 lenses onto the 645, and you lose lens 
automation.
645 lenses don't project a large enough image circle to cover 6x7, 
and I don't think the 645 flange to focal plane distance is long 
enough to allow a 645 lens to work on the 6x7 anyway.

William Robb 





RE: 645 - 6x7

2005-03-14 Thread Pedro Oliveira
Hi, Kevin and all.

Sorry for my previous post that was empty.

6x7 lenses used on a 645 body via the 645/6x7 adapter allows you to
maintain the lens automation and open aperture metering in the following
modes:
- aperture priority
- manual
- TTL flash automation

You loose these modes (because the 6x7/67 lenses lack the A setting):
- program
- shutter priority
- aperture priority automation achieved when the aperture ring is in A
(only 645 lenses has it)

Hope this helps.

Pedro Oliveira
Portugal

-Mensagem original-
De: Kevin Waterson [mailto:[EMAIL PROTECTED] 
Enviada: domingo, 13 de Março de 2005 14:34
Para: pentax-discuss@pdml.net
Assunto: 645 - 6x7

Are the 645 and 6x7 lenses interchangeable?

eg: could I use my 105mm for the 6x7 on a 645?

Kind regards
Kevin

-- 
Democracy is two wolves and a lamb voting on what to have for lunch. 
Liberty is a well-armed lamb contesting the vote.





Re: 645 - 6x7

2005-03-14 Thread Bob Sullivan
David,
You missed this one...
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemrd=1item=3876916366
Regards,  Bob S.

On Mon, 14 Mar 2005 20:11:54 +1300, David Mann [EMAIL PROTECTED] wrote:
 On Mar 14, 2005, at 3:32 PM, Kevin Waterson wrote:
 
  Unless a digital 6x7
 
 One of those would be nice.  Only because I'd be waiting for some nice
 67IIs to turn up on the secondhand market :)
 
 Cheers,
 
 - Dave
 
 http://www.digistar.com/~dmann/
 




Re: 645 - 6x7

2005-03-14 Thread Peter J. Alling
Pedro Oliveira wrote:
Hi, Kevin and all.
Sorry for my previous post that was empty.
6x7 lenses used on a 645 body via the 645/6x7 adapter allows you to
maintain the lens automation and open aperture metering in the following
modes:
- aperture priority
- manual
- TTL flash automation
You loose these modes (because the 6x7/67 lenses lack the A setting):
- program
- shutter priority
- aperture priority automation achieved when the aperture ring is in A
(only 645 lenses has it)
Hope this helps.
Pedro Oliveira
Portugal
-Mensagem original-
De: Kevin Waterson [mailto:[EMAIL PROTECTED] 
Enviada: domingo, 13 de Março de 2005 14:34
Para: pentax-discuss@pdml.net
Assunto: 645 - 6x7

Are the 645 and 6x7 lenses interchangeable?
eg: could I use my 105mm for the 6x7 on a 645?
Kind regards
Kevin
 

Short answer: NO.
--
I can understand why mankind hasn't given up war. 
During a war you get to drive tanks through the sides of buildings 
and shoot foreigners - two things that are usually frowned on during peacetime.
	--P.J. O'Rourke




Re: 645 - 6x7

2005-03-14 Thread William Robb
- Original Message - 
From: Peter J. Alling
Subject: Re: 645 - 6x7


-Mensagem original-
De: Kevin Waterson

Are the 645 and 6x7 lenses interchangeable?
eg: could I use my 105mm for the 6x7 on a 645?


Short answer: NO.
Long answer:
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItemcategory=3353item=3880975086rd=1



Re: 645 - 6x7

2005-03-14 Thread Mishka
if you pay for a *full frame* 645, P645 lenses will be less than your sales tax.
i mean, ALL of them, together.

mishka


On Mon, 14 Mar 2005 13:32:04 +1100, Kevin Waterson [EMAIL PROTECTED] wrote:
 This one time, at band camp, William Robb [EMAIL PROTECTED] wrote:
 
  You need an adaptor to put 6x7 lenses onto the 645, and you lose lens
  automation.
 
 My reason for asking was that if Pentax ever made a digital Full Frame
 for a 645 I would need to buy some lenses. Unless a digital 6x7
 
 Kevin
 
 
 --
 Democracy is two wolves and a lamb voting on what to have for lunch.
 Liberty is a well-armed lamb contesting the vote.
 




Re: 645 - 6x7

2005-03-13 Thread William Robb
- Original Message - 
From: Kevin Waterson
Subject: 645 - 6x7


Are the 645 and 6x7 lenses interchangeable?
eg: could I use my 105mm for the 6x7 on a 645?
You need an adaptor to put 6x7 lenses onto the 645, and you lose lens 
automation.
645 lenses don't project a large enough image circle to cover 6x7, 
and I don't think the 645 flange to focal plane distance is long 
enough to allow a 645 lens to work on the 6x7 anyway.

William Robb 




Re: 645 - 6x7

2005-03-13 Thread Peter J. Alling
Yes, with an adapter.  Just like you could use it on a k-mount.  (It 
won't work in reverse).

Kevin Waterson wrote:
Are the 645 and 6x7 lenses interchangeable?
eg: could I use my 105mm for the 6x7 on a 645?
Kind regards
Kevin
 


--
I can understand why mankind hasn't given up war. 
During a war you get to drive tanks through the sides of buildings 
and shoot foreigners - two things that are usually frowned on during peacetime.
	--P.J. O'Rourke




Re: 645 - 6x7

2005-03-13 Thread Kevin Waterson
This one time, at band camp, William Robb [EMAIL PROTECTED] wrote:


 You need an adaptor to put 6x7 lenses onto the 645, and you lose lens 
 automation.

My reason for asking was that if Pentax ever made a digital Full Frame
for a 645 I would need to buy some lenses. Unless a digital 6x7

Kevin
 


-- 
Democracy is two wolves and a lamb voting on what to have for lunch. 
Liberty is a well-armed lamb contesting the vote.



Re: 645 - 6x7

2005-03-13 Thread David Mann
On Mar 14, 2005, at 3:32 PM, Kevin Waterson wrote:
Unless a digital 6x7
One of those would be nice.  Only because I'd be waiting for some nice 
67IIs to turn up on the secondhand market :)

Cheers,
- Dave
http://www.digistar.com/~dmann/