Pentax Takumar 500 mm / 4.5

susantoadhi · 12-20-2017, 02:33 AM

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HI Every Body,

I bought an SMC Pentax Takumar 500 mm/4.5, it is an interchangeable lens, and i dont have any interchangeable part, so i cannot connect it into any adapter to fit the lense to my sony a mount, can anyone help or inform me where to find the part?

Thanks

Attached Images

Sandy Hancock · 12-20-2017, 03:23 AM

I would be very surprised if there wasn't a M42 to SONY adaptor somewhere....

@pinholecam ?

**clackers** · 12-20-2017, 04:03 AM - **1 Like**

This sort of thing ...

Fotodiox Lens Mount Adapter , M42 Lens to Sony Alpha: Amazon.co.uk: Camera & Photo

Adam · 12-20-2017, 04:26 AM

Is it just me or is the lens in the photo missing its mount?

Adam
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**blumoon722** · 12-20-2017, 06:35 AM

Originally posted by Adam

Is it just me or is the lens in the photo missing its mount?

I think you're right.

**luftfluss** · 12-20-2017, 06:41 AM

Originally posted by Adam

Is it just me or is the lens in the photo missing its mount?

Originally posted by blumoon722

I think you're right.

Looks that way to me, too. The mount is removable to install filters, isn't it?

**UncleVanya** · 12-20-2017, 07:31 AM

The mount is also interchangable from m42 to K - these lenses occasionally are separated from this part which is virtually impossible to find. Someone will have to make a part to replace it. 3D printing might work since the lens isn't going to be held up by the camera body with that massive thing! Alternately someone can machine one or cobble one from other available parts. If I were the owner I'd skip the k adapter and make a direct to Sony adapter at this point.

**monochrome** · 12-20-2017, 07:32 AM

The lens is missing the mount tube, which would have been either m42 or K-mount depending on when the lens was made. Mount tubes alone are no longer available as new stock and finding one as NOS would be as improbable as winning the lottery.

**UncleVanya** · 12-20-2017, 07:34 AM

I will advise not to spend a ton on the project as my own experience with this model lens is that it isn't tack sharp and is frustrating to use. Most modern telephoto cropped are better and teleconverters make much lighter lenses functionally equivalent (albeit slower) with the high iso options available to us.

Not a Number · 12-20-2017, 07:53 AM

Seems like this came in screw mount and k-mount. It does use rear filters. OP says the interchangeable mount part is missing.

Here is the screw-mount version. You can see the missing rear piece which is also shown in the technical drawing above.

from this webpage: S-M-C Takumar - www.pentax-slr.com

The review database and one for sale on ebay show a K-mount on them, doesn't look like a m42 to k-mount adapter. Auctions mention that it came in M42 and (more rare) K-mount.

SMC PENTAX TAKUMAR ASAHI 500mm f/4.5 CAMERA LENS JAPAN MINT CONDITION | eBay
?Near Mint?Pentax SMC Takumar 500mm f/4.5 Lens for K Mount from Japan #085 4003915052047 | eBay

**UncleVanya** · 12-20-2017, 08:39 AM

The one I had was m42 with a k mount adapter permanently affixed but I've seen k mounts that were native like the one shown on eBay. It is a fairly simple tube no mechanical linkage to aperture or anything else. It should be possible to make.

Reliant K1000 · 12-20-2017, 02:24 PM

I have a very cheap Vivitar 500mm mirror lens and it has the m42 to K mount in it...maybe comb the used market and get one of those..

**UncleVanya** · 12-20-2017, 02:27 PM

Originally posted by Reliant K1000

I have a very cheap Vivitar 500mm mirror lens and it has the m42 to K mount in it...maybe comb the used market and get one of those..

? The problem is that this lens come with a tube that terminates in an m42 or k mount that fits this specific lens.

**monochrome** · 12-20-2017, 02:58 PM - **1 Like**

If ‘Takumar’ is on the beauty ring the lens was issued with an m42 mount tube between 1966 and 1975. The optics were upgraded to ‘Super-Multi-Coated’ and the engraved name changed to that nomenclature during production.

In 1975 the engraved name was changed to ‘SMC Pentax’ and the lens was supplied with a K-mount Mount Tube. The engraved name was again altered in 1977 to align with the M (followed by A) lenses naming convention.

I believe production continued in small quantities into the mid to late 80’s but the production end date was removed from K-mount Page. My notes for my lens say I believed at the time I added it to the Serial Number Database that it was made in 1989. It has the 2nd highest Serial here.

Not a Number · 12-20-2017, 03:48 PM

Here's one with the M42 mount:
TAKUMAR 500mm F/4.5 TELEPHOTO LENS FOR M42 MOUNT 35mm FILM SLRs | eBay

Interesting as it has a simple notched "gunsight" on it.

12-20-2017, 02:33 AM	#1
susantoadhi New Member Join Date: Dec 2017 Posts: 3	Pentax Takumar 500 mm / 4.5 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. HI Every Body, I bought an SMC Pentax Takumar 500 mm/4.5, it is an interchangeable lens, and i dont have any interchangeable part, so i cannot connect it into any adapter to fit the lense to my sony a mount, can anyone help or inform me where to find the part? Thanks Attached Images

12-20-2017, 07:34 AM	#9
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,445	I will advise not to spend a ton on the project as my own experience with this model lens is that it isn't tack sharp and is frustrating to use. Most modern telephoto cropped are better and teleconverters make much lighter lenses functionally equivalent (albeit slower) with the high iso options available to us. Last edited by UncleVanya; 12-20-2017 at 08:36 AM.

12-20-2017, 02:58 PM - 1 Like	#14
monochrome Loyal Site Supporter Join Date: Mar 2008 Location: Working From Home Photos: Gallery \| Albums Posts: 26,276	If ‘Takumar’ is on the beauty ring the lens was issued with an m42 mount tube between 1966 and 1975. The optics were upgraded to ‘Super-Multi-Coated’ and the engraved name changed to that nomenclature during production. In 1975 the engraved name was changed to ‘SMC Pentax’ and the lens was supplied with a K-mount Mount Tube. The engraved name was again altered in 1977 to align with the M (followed by A) lenses naming convention. I believe production continued in small quantities into the mid to late 80’s but the production end date was removed from K-mount Page. My notes for my lens say I believed at the time I added it to the Serial Number Database that it was made in 1989. It has the 2nd highest Serial here. Last edited by monochrome; 12-20-2017 at 03:07 PM.

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12-20-2017, 03:23 AM	#2
Sandy Hancock Moderator Site Supporter Join Date: Feb 2012 Location: Adelaide Hills, South Australia Photos: Gallery \| Albums Posts: 11,275	I would be very surprised if there wasn't a M42 to SONY adaptor somewhere.... @pinholecam ?

12-20-2017, 04:03 AM - 1 Like	#3
clackers Otis Memorial Pentaxian Join Date: Jul 2013 Location: Melbourne Photos: Albums Posts: 16,397	This sort of thing ... Fotodiox Lens Mount Adapter , M42 Lens to Sony Alpha: Amazon.co.uk: Camera & Photo

12-20-2017, 04:26 AM	#4
Adam Administrator Site Webmaster Join Date: Sep 2006 Location: Arizona Photos: Gallery \| Albums Posts: 51,597	Is it just me or is the lens in the photo missing its mount? Adam PentaxForums.com Webmaster (Site Usage Guide \| Site Help \| My Photography) PentaxForums.com server and development costs are user-supported. You can help cover these costs by donating or purchasing one of our Pentax eBooks. Or, buy your photo gear from our affiliates, Adorama, B&H Photo, KEH, or Topaz Labs, and get FREE Marketplace access - click here to see how! Trusted Pentax retailers:

12-20-2017, 06:35 AM	#5
blumoon722 Loyal Site Supporter Join Date: Jul 2015 Posts: 424	Originally posted by Adam Is it just me or is the lens in the photo missing its mount? I think you're right.

12-20-2017, 06:41 AM	#6
luftfluss Site Supporter Join Date: Jun 2011 Location: NJ Photos: Gallery \| Albums Posts: 11,626	Originally posted by Adam Is it just me or is the lens in the photo missing its mount? Originally posted by blumoon722 I think you're right. Looks that way to me, too. The mount is removable to install filters, isn't it?

12-20-2017, 07:31 AM	#7
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,445	The mount is also interchangable from m42 to K - these lenses occasionally are separated from this part which is virtually impossible to find. Someone will have to make a part to replace it. 3D printing might work since the lens isn't going to be held up by the camera body with that massive thing! Alternately someone can machine one or cobble one from other available parts. If I were the owner I'd skip the k adapter and make a direct to Sony adapter at this point.

12-20-2017, 07:32 AM	#8
monochrome Loyal Site Supporter Join Date: Mar 2008 Location: Working From Home Photos: Gallery \| Albums Posts: 26,276	The lens is missing the mount tube, which would have been either m42 or K-mount depending on when the lens was made. Mount tubes alone are no longer available as new stock and finding one as NOS would be as improbable as winning the lottery.

12-20-2017, 07:53 AM	#10
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Seems like this came in screw mount and k-mount. It does use rear filters. OP says the interchangeable mount part is missing. Here is the screw-mount version. You can see the missing rear piece which is also shown in the technical drawing above. from this webpage: S-M-C Takumar - www.pentax-slr.com The review database and one for sale on ebay show a K-mount on them, doesn't look like a m42 to k-mount adapter. Auctions mention that it came in M42 and (more rare) K-mount. SMC PENTAX TAKUMAR ASAHI 500mm f/4.5 CAMERA LENS JAPAN MINT CONDITION \| eBay ?Near Mint?Pentax SMC Takumar 500mm f/4.5 Lens for K Mount from Japan #085 4003915052047 \| eBay

12-20-2017, 08:39 AM	#11
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,445	The one I had was m42 with a k mount adapter permanently affixed but I've seen k mounts that were native like the one shown on eBay. It is a fairly simple tube no mechanical linkage to aperture or anything else. It should be possible to make.

12-20-2017, 02:24 PM	#12
Reliant K1000 Senior Member Join Date: Nov 2012 Location: BC - On the 49th parallel Photos: Gallery \| Albums Posts: 235	I have a very cheap Vivitar 500mm mirror lens and it has the m42 to K mount in it...maybe comb the used market and get one of those..

12-20-2017, 02:27 PM	#13
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,445	Originally posted by Reliant K1000 I have a very cheap Vivitar 500mm mirror lens and it has the m42 to K mount in it...maybe comb the used market and get one of those.. ? The problem is that this lens come with a tube that terminates in an m42 or k mount that fits this specific lens.

12-20-2017, 03:48 PM	#15
Not a Number Moderator Join Date: Mar 2012 Location: Venice, CA Posts: 10,526	Here's one with the M42 mount: TAKUMAR 500mm F/4.5 TELEPHOTO LENS FOR M42 MOUNT 35mm FILM SLRs \| eBay Interesting as it has a simple notched "gunsight" on it.