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windhorse · 02-09-2015, 08:55 PM

This maybe a weird question but I would like to know the answer anyways.

I just found this obscure reference like buried treasure in an old post:

Originally posted by Yamanobori

Especially since there are Pentax 645 to Hasselblad adapters available.

but cannot find any other reference to such an adapter anywhere else, so I figure if anybody knows if such an adapter exists or not this is the place to ask.

The reason I am asking this question is a bit weird too. I would like to be able to use my medium format Sinarback digital back with an image stabilised lens. This particular digital back can go on any Hasselblad, Mamiya or Contax digital camera via a user interchangeable adapter plate. But only Pentax is weird enough to make a MF stabilised lens, 2 in fact.

So in theory I should be able to connect my Contax digital back to a Pentax 645 SR lens via a Hasselblad body if there are, as at least one person suggests, "Pentax 645 to Hasselblad adapters available" ..... unless of course this refers to Pentax 645 body to Hasselblad lens adapters rather than the other way around... in which case this bright idea is probably not likely to go much further.

Yes, I know I could just buy a used 645D for a pittance but that is another story, right.

Or I could just buy a 645Z for an even bigger pittance that has such good high iso performance image stabilization becomes irrelevant at least for my style of shooting but hey $9000 is a very big pittance!

Or I could just go buy a DSLR but that is also another story so don´t let´s go there for now... please!

**Digitalis** · 02-09-2015, 09:09 PM

it isn't possible to adapt and use an optically stabilized lens and maintain full functionality. The SR system requires power to operate - these adapters lack the necessary electronics for this, and the camera itself will not be designed for the lens to use continuous power draw. Adapting a lens is an unsound solution, the only way to gain full use of an optically stabilized lens is to buy a 645D or 645Z. there is no other way.

You will have to wait for hasselblad (Fuji) to produce such a lens, and it will likely carry a hefty price tag as all things that carry the Zeiss name do.

windhorse · 02-09-2015, 09:18 PM

Thanks heaps Digitalis your expert reply saved me a lot of wasted time looking further into this.

Of course I could try to hook up the $3000 645 90mm f2.8 SR lens to my car battery with some jumper cables to supply the power... but I don´t think my wife is ready to go along with that.

**Digitalis** · 02-09-2015, 09:57 PM - **1 Like**

Originally posted by windhorse

Of course I could try to hook up the $3000 645 90mm f2.8 SR lens to my car battery with some jumper cables to supply the power... but I don´t think my wife is ready to go along with that.

Also, running that much power through the lens contacts would undoubtedly void the lenses warranty, and probably cause the lens to catch fire.

tuco · 02-18-2015, 10:43 AM

A car battery is 12V DC. The battery in a camera is also DC and probably a little less in voltage. The electronics inside the camera will pull the amps it needs. It's not like the car battery is going to hit the camera with 30 amps if you connected it. The contacts should easily handle 12V.

windhorse · 02-18-2015, 08:55 PM

Originally posted by tuco

A car battery is 12V DC. The battery in a camera is also DC and probably a little less in voltage. The electronics inside the camera will pull the amps it needs. It's not like the car battery is going to hit the camera with 30 amps if you connected it. The contacts should easily handle 12V.

thanks Tuco for this good advice, I wish I had the courage to tell my wife but fear if I do she´ll just whack me with the wok again!

**Digitalis** · 02-18-2015, 11:43 PM

Originally posted by tuco

It's not like the car battery is going to hit the camera with 30 amps if you connected it. The contacts should easily handle 12V.

I was being sarcastic about the car battery, I wasn't in any way suggesting it as a practical approach to obtaining functional Lens based IS on a camera that doesn't natively support it.

tuco · 02-19-2015, 07:46 AM

Originally posted by Digitalis

I was being sarcastic about the car battery, I wasn't in any way suggesting it as a practical approach to obtaining functional Lens based IS on a camera that doesn't natively support it.

It's still not a good idea to connect that car battery directly to lens unless you know what the circuit is like in them.

02-09-2015, 08:55 PM	#1
windhorse Senior Member Join Date: Oct 2012 Posts: 101	pentax 645 (SR) lens to Hasselblad adapter? This maybe a weird question but I would like to know the answer anyways. I just found this obscure reference like buried treasure in an old post: Originally posted by Yamanobori Especially since there are Pentax 645 to Hasselblad adapters available. but cannot find any other reference to such an adapter anywhere else, so I figure if anybody knows if such an adapter exists or not this is the place to ask. The reason I am asking this question is a bit weird too. I would like to be able to use my medium format Sinarback digital back with an image stabilised lens. This particular digital back can go on any Hasselblad, Mamiya or Contax digital camera via a user interchangeable adapter plate. But only Pentax is weird enough to make a MF stabilised lens, 2 in fact. So in theory I should be able to connect my Contax digital back to a Pentax 645 SR lens via a Hasselblad body if there are, as at least one person suggests, "Pentax 645 to Hasselblad adapters available" ..... unless of course this refers to Pentax 645 body to Hasselblad lens adapters rather than the other way around... in which case this bright idea is probably not likely to go much further. Yes, I know I could just buy a used 645D for a pittance but that is another story, right. Or I could just buy a 645Z for an even bigger pittance that has such good high iso performance image stabilization becomes irrelevant at least for my style of shooting but hey $9000 is a very big pittance! Or I could just go buy a DSLR but that is also another story so don´t let´s go there for now... please!

02-09-2015, 09:09 PM	#2
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,695	it isn't possible to adapt and use an optically stabilized lens and maintain full functionality. The SR system requires power to operate - these adapters lack the necessary electronics for this, and the camera itself will not be designed for the lens to use continuous power draw. Adapting a lens is an unsound solution, the only way to gain full use of an optically stabilized lens is to buy a 645D or 645Z. there is no other way. You will have to wait for hasselblad (Fuji) to produce such a lens, and it will likely carry a hefty price tag as all things that carry the Zeiss name do. Last edited by Digitalis; 02-09-2015 at 09:14 PM.

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02-09-2015, 09:18 PM	#3
windhorse Senior Member Join Date: Oct 2012 Posts: 101 Original Poster	Thanks heaps Digitalis your expert reply saved me a lot of wasted time looking further into this. Of course I could try to hook up the $3000 645 90mm f2.8 SR lens to my car battery with some jumper cables to supply the power... but I don´t think my wife is ready to go along with that.

02-09-2015, 09:57 PM - 1 Like	#4
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,695	Originally posted by windhorse Of course I could try to hook up the $3000 645 90mm f2.8 SR lens to my car battery with some jumper cables to supply the power... but I don´t think my wife is ready to go along with that. Also, running that much power through the lens contacts would undoubtedly void the lenses warranty, and probably cause the lens to catch fire.

02-18-2015, 10:43 AM	#5
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 11,033	A car battery is 12V DC. The battery in a camera is also DC and probably a little less in voltage. The electronics inside the camera will pull the amps it needs. It's not like the car battery is going to hit the camera with 30 amps if you connected it. The contacts should easily handle 12V.

02-18-2015, 08:55 PM	#6
windhorse Senior Member Join Date: Oct 2012 Posts: 101 Original Poster	Originally posted by tuco A car battery is 12V DC. The battery in a camera is also DC and probably a little less in voltage. The electronics inside the camera will pull the amps it needs. It's not like the car battery is going to hit the camera with 30 amps if you connected it. The contacts should easily handle 12V. thanks Tuco for this good advice, I wish I had the courage to tell my wife but fear if I do she´ll just whack me with the wok again!

02-18-2015, 11:43 PM	#7
Digitalis Site Supporter Join Date: Mar 2009 Location: Melbourne, Victoria Photos: Gallery Posts: 11,695	Originally posted by tuco It's not like the car battery is going to hit the camera with 30 amps if you connected it. The contacts should easily handle 12V. I was being sarcastic about the car battery, I wasn't in any way suggesting it as a practical approach to obtaining functional Lens based IS on a camera that doesn't natively support it.

02-19-2015, 07:46 AM	#8
tuco Pentaxian Join Date: Jul 2009 Location: Pugetopolis Posts: 11,033	Originally posted by Digitalis I was being sarcastic about the car battery, I wasn't in any way suggesting it as a practical approach to obtaining functional Lens based IS on a camera that doesn't natively support it. It's still not a good idea to connect that car battery directly to lens unless you know what the circuit is like in them.

pentax 645 (SR) lens to Hasselblad adapter?

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