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dugrant153 · 08-21-2011, 11:00 PM

Hi folks,

I saw someone do it for the Pentax 645D, but I'd like to see what people think and see what images look like for this setup for putting the 67 105MM F2.4 lens on a Pentax 645 (film)?

Sounds like I'd be getting a "slightly faster" and "slightly longer" normal lens (sometimes I find the 75mm F2.8 a bit short, but the next step up would be 150mm F3.5 ... the 120mm F4 Macro would be too slow).

Makten · 08-22-2011, 02:44 AM

I haven't tried, but it should work fine. Don't forget the 67 90/2.8 if you only want a slightly longer lens!

Zygonyx · 08-22-2011, 07:27 AM

... and slighly leighter / compact as the 105mm as well !

Makten · 08-22-2011, 03:05 PM

Originally posted by Zygonyx

... and slighly leighter / compact as the 105mm as well !

Yeah, but the size is in fact very similar. The 105 is like ~10 mm longer and 105 grams more, and that's all.

An other, perhaps more important difference, is the close range limit. The 90 goes down to 0.65 meters while the 105 stops at 1.0 meters.

In my opinion, the 105/2.4 is a better lens. But the 90 is sharper and if 90 is a more suitable focal length, I'd choose it instead for the 645 format.

phonoline · 08-24-2011, 09:36 AM

Also nice: the 100mm macro. You can get as close as you want and it's tack sharp on my 645D. I love this lens.

dugrant153 · 08-24-2011, 10:27 AM

Originally posted by Makten

105/2.4 is a better lens. But the 90 is sharper and if 90 is a more suitable focal length, I'd choose it instead for the 645 format.

The 90mm F2.8 sounds like a good lens... hmm... would love to see some shots taken with it.
I'm thinking the 105 F2.4 just to get that extra 0.6 F-stop wider aperture... lol.

tuco · 08-24-2011, 11:42 AM

Originally posted by dugrant153

The 90mm F2.8 sounds like a good lens... hmm... would love to see some shots taken with it.

Here are some 90mm on a P6x7...

dugrant153 · 08-24-2011, 11:45 AM

Thanks! Those are great shots!
I guess a 645 would crop those images slightly.

tuco · 08-24-2011, 12:18 PM

Originally posted by dugrant153

Thanks! Those are great shots!
I guess a 645 would crop those images slightly.

Thanks. Given a 105mm on a 645 is about equivalent to a portrait 85mm in 135 format, yes, you would have a mild telephoto.

Makten · 08-24-2011, 04:59 PM

Originally posted by dugrant153

Thanks! Those are great shots!
I guess a 645 would crop those images slightly.

Um, definitely more than "slightly". 55x70 mm versus 33x44 is a huge difference.

Roberts · 08-25-2011, 05:39 AM

Originally posted by Makten

Um, definitely more than "slightly". 55x70 mm versus 33x44 is a huge difference.

My guess according to first post - OP is talking about film 645

Makten · 08-25-2011, 05:44 AM

Originally posted by Roberts

My guess according to first post - OP is talking about film 645

Crap, I was a bit tired.

08-21-2011, 11:00 PM	#1
dugrant153 Veteran Member Join Date: Oct 2007 Location: Vancouver, BC Photos: Gallery Posts: 1,059	Pentax 6x7 105mm F2.4 lens on a Pentax 645? Hi folks, I saw someone do it for the Pentax 645D, but I'd like to see what people think and see what images look like for this setup for putting the 67 105MM F2.4 lens on a Pentax 645 (film)? Sounds like I'd be getting a "slightly faster" and "slightly longer" normal lens (sometimes I find the 75mm F2.8 a bit short, but the next step up would be 150mm F3.5 ... the 120mm F4 Macro would be too slow).

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08-22-2011, 02:44 AM	#2
Makten Inactive Account Join Date: Dec 2010 Location: Stockholm Posts: 224	I haven't tried, but it should work fine. Don't forget the 67 90/2.8 if you only want a slightly longer lens!

08-22-2011, 07:27 AM	#3
Zygonyx Pentaxian Join Date: Jun 2011 Location: Ile de France Posts: 4,022	... and slighly leighter / compact as the 105mm as well !

08-22-2011, 03:05 PM	#4
Makten Inactive Account Join Date: Dec 2010 Location: Stockholm Posts: 224	Originally posted by Zygonyx ... and slighly leighter / compact as the 105mm as well ! Yeah, but the size is in fact very similar. The 105 is like ~10 mm longer and 105 grams more, and that's all. An other, perhaps more important difference, is the close range limit. The 90 goes down to 0.65 meters while the 105 stops at 1.0 meters. In my opinion, the 105/2.4 is a better lens. But the 90 is sharper and if 90 is a more suitable focal length, I'd choose it instead for the 645 format.

08-24-2011, 09:36 AM	#5
phonoline Senior Member Join Date: Jun 2010 Location: Hamburg Posts: 267	Also nice: the 100mm macro. You can get as close as you want and it's tack sharp on my 645D. I love this lens.

08-24-2011, 10:27 AM	#6
dugrant153 Veteran Member Join Date: Oct 2007 Location: Vancouver, BC Photos: Gallery Posts: 1,059 Original Poster	Originally posted by Makten 105/2.4 is a better lens. But the 90 is sharper and if 90 is a more suitable focal length, I'd choose it instead for the 645 format. The 90mm F2.8 sounds like a good lens... hmm... would love to see some shots taken with it. I'm thinking the 105 F2.4 just to get that extra 0.6 F-stop wider aperture... lol.

08-24-2011, 11:42 AM	#7
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 10,872	Originally posted by dugrant153 The 90mm F2.8 sounds like a good lens... hmm... would love to see some shots taken with it. Here are some 90mm on a P6x7...

08-24-2011, 11:45 AM	#8
dugrant153 Veteran Member Join Date: Oct 2007 Location: Vancouver, BC Photos: Gallery Posts: 1,059 Original Poster	Thanks! Those are great shots! I guess a 645 would crop those images slightly.

08-24-2011, 12:18 PM	#9
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 10,872	Originally posted by dugrant153 Thanks! Those are great shots! I guess a 645 would crop those images slightly. Thanks. Given a 105mm on a 645 is about equivalent to a portrait 85mm in 135 format, yes, you would have a mild telephoto.

08-24-2011, 04:59 PM	#10
Makten Inactive Account Join Date: Dec 2010 Location: Stockholm Posts: 224	Originally posted by dugrant153 Thanks! Those are great shots! I guess a 645 would crop those images slightly. Um, definitely more than "slightly". 55x70 mm versus 33x44 is a huge difference.

08-25-2011, 05:39 AM	#11
Roberts Senior Member Join Date: Apr 2008 Location: Latvia Photos: Gallery Posts: 127	Originally posted by Makten Um, definitely more than "slightly". 55x70 mm versus 33x44 is a huge difference. My guess according to first post - OP is talking about film 645

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08-25-2011, 05:44 AM	#12
Makten Inactive Account Join Date: Dec 2010 Location: Stockholm Posts: 224	Originally posted by Roberts My guess according to first post - OP is talking about film 645 Crap, I was a bit tired.

Pentax 6x7 105mm F2.4 lens on a Pentax 645?

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