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Rosario_CH · 05-07-2016, 04:14 AM

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While I am still (impatiently) waiting for my k1, I noticed that so far nobody tested it with some of the 645 lenses ... (or am I wrong ? )

Last edited by Rosario_CH; 05-07-2016 at 06:18 AM.

Unregistered User · 05-07-2016, 04:28 AM

I am curious to but also with 67, 6x7 lenses.

CDW · 05-07-2016, 09:04 AM

From my past experience with 645 lenses on a K3 and a Canon 5D2, I would expect several of them (35mm, 55mm, 120mm macro) to be superb. The new 645 28-45 is exemplary in performance but too heavy and not cost effective for use with the K1.

Rosario_CH · 05-07-2016, 11:06 AM

I usually work with Pentax MF (now with 645Z ) ; I like so much Pentax that I decided without any doubt to get the k-1 but I would hope not to invest a bag of money in new glasses (I just own the 50 and 100 macro WR).... I frankly expect Pentax will give us , sooner or later, a new adapter to mount the 645 lenses on K-1, including AF ....
Btw me too I have tested the 645 lenses on Canon 5dmk3 and on Sony A7r2 ; I found quite good the FA 120 macro and I was wondering how it will perform on K-1.

Borrelli · 07-30-2016, 01:33 PM

Is the adapter available yet? I do not own any 645 glass, but some of it can be picked up at nice prices.

**RobA_Oz** · 07-30-2016, 01:59 PM

Originally posted by Borrelli

Is the adapter available yet? I do not own any 645 glass, but some of it can be picked up at nice prices.

Is the old manual adapter no longer available, or is there a new version expected?

Rosario_CH · 07-30-2016, 02:02 PM

I tried on k-1 a couple of my old 645 lenses : 120 mm macro, and 150mm ( with the Pentax adapter fm 645 to K ) and also a glorious Hassy 150 mm (fotodiox adapter ring) .... The result is generally excellent but finding a perfect focus by hand is not a breeze ; I found it hard to be set by viewfinder and impossible by LV. So better using a tripod and possibly also a LCD magnifier (I used the LCD VF mounted on my 645Z) ...
I hope in a new ring from Pentax which could allow the full use of the AF ...

PS
I have seen on Ebay the original Pentax adapter 645 to K but is not so cheap......
give a look
http://www.ebay.com/itm/Mint-Pentax-Adapter-K-for-645-Lens-A645-/15218017917...sAAOSwtnpXlWv1

Last edited by Rosario_CH; 07-30-2016 at 02:13 PM.

Borrelli · 07-30-2016, 02:12 PM

I believe the K-1 has the contacts to make AF work if you look closely at the mount. Almost no one talks about this but I do expect a new adapter ring with AF functionality. Maybe someone in the know could chime in, Adam?

05-07-2016, 04:14 AM	#1
Rosario_CH New Member Join Date: Aug 2013 Location: Lugano (CH) Posts: 14	K-1 and 645 lenses Staff note: This post may contain affiliate links, which means Pentax Forums may earn a small commission if a visitor clicks through and makes a purchase. If you would like to support the forum directly, you may also make a donation here. While I am still (impatiently) waiting for my k1, I noticed that so far nobody tested it with some of the 645 lenses ... (or am I wrong ? ) Last edited by Rosario_CH; 05-07-2016 at 06:18 AM.

07-30-2016, 02:02 PM	#7
Rosario_CH New Member Join Date: Aug 2013 Location: Lugano (CH) Posts: 14 Original Poster	Excellent I tried on k-1 a couple of my old 645 lenses : 120 mm macro, and 150mm ( with the Pentax adapter fm 645 to K ) and also a glorious Hassy 150 mm (fotodiox adapter ring) .... The result is generally excellent but finding a perfect focus by hand is not a breeze ; I found it hard to be set by viewfinder and impossible by LV. So better using a tripod and possibly also a LCD magnifier (I used the LCD VF mounted on my 645Z) ... I hope in a new ring from Pentax which could allow the full use of the AF ... PS I have seen on Ebay the original Pentax adapter 645 to K but is not so cheap...... give a look http://www.ebay.com/itm/Mint-Pentax-Adapter-K-for-645-Lens-A645-/15218017917...sAAOSwtnpXlWv1 Last edited by Rosario_CH; 07-30-2016 at 02:13 PM.

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05-07-2016, 04:28 AM	#2
Unregistered User Guest	I am curious to but also with 67, 6x7 lenses.

05-07-2016, 09:04 AM	#3
CDW Site Supporter Join Date: May 2011 Location: Big Island, Hawaii & Utah Posts: 457	From my past experience with 645 lenses on a K3 and a Canon 5D2, I would expect several of them (35mm, 55mm, 120mm macro) to be superb. The new 645 28-45 is exemplary in performance but too heavy and not cost effective for use with the K1.

05-07-2016, 11:06 AM	#4
Rosario_CH New Member Join Date: Aug 2013 Location: Lugano (CH) Posts: 14 Original Poster	I usually work with Pentax MF (now with 645Z ) ; I like so much Pentax that I decided without any doubt to get the k-1 but I would hope not to invest a bag of money in new glasses (I just own the 50 and 100 macro WR).... I frankly expect Pentax will give us , sooner or later, a new adapter to mount the 645 lenses on K-1, including AF .... Btw me too I have tested the 645 lenses on Canon 5dmk3 and on Sony A7r2 ; I found quite good the FA 120 macro and I was wondering how it will perform on K-1.

07-30-2016, 01:33 PM	#5
Borrelli Senior Member Join Date: Feb 2015 Location: Utrecht Posts: 124	Is the adapter available yet? I do not own any 645 glass, but some of it can be picked up at nice prices.

07-30-2016, 01:59 PM	#6
RobA_Oz Site Supporter Join Date: Nov 2008 Location: Tasmania, Australia Photos: Gallery Posts: 8,209	Originally posted by Borrelli Is the adapter available yet? I do not own any 645 glass, but some of it can be picked up at nice prices. Is the old manual adapter no longer available, or is there a new version expected?

07-30-2016, 02:12 PM	#8
Borrelli Senior Member Join Date: Feb 2015 Location: Utrecht Posts: 124	I believe the K-1 has the contacts to make AF work if you look closely at the mount. Almost no one talks about this but I do expect a new adapter ring with AF functionality. Maybe someone in the know could chime in, Adam?

K-1 and 645 lenses

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