Does an adaptor like this exist?


handlep

Link Posted 08/01/2014 - 11:13
Hi folks, I wonder if anyone can tell me if this beastie is out there.

I want to reverse a K mount lens on my K-x for macro work - no problem with that, I have a male K mount to 49mm filter thread adaptor, and that does that bit OK. But what I want to do now is mount my ring light on the back of the lens. So what I need is a female K mount to a filter thread adaptor (doesn't matter what thread size, I have several adaptors for that).

I've googled, but all I find is the adaptors to reverse the lens onto the body.

Any ideas anyone please? Many thanks in advance.
Pete

Pentax K-3, Pentax K-x, DAL 18-55 WR, DAL 18-55, DA 50-200 WR, DAL 50-200, Sigma 70-300mm APO Macro DG, Battery Grip, Metz Mecablitz 48 AF-1, FluCard.

johnriley

Link Posted 08/01/2014 - 11:16
Ring lights are usually supplied with adapter rings, so if you don't have the rings why not try SRB Griturn who make all sorts of rings and adapters.
Best regards, John

MattMatic

Link Posted 08/01/2014 - 11:35
Quote:
Any ideas anyone please?

Cut up an old rear K-mount cap and glue and old filter to it?

You'll need a way to stop the K mount unlocking. The body's lock uses a pin to stop the lens rotating, but other things could work too (elastic, Sugru etc).

Or you could butcher an old K mount camera for the mount and lock...

Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)

handlep

Link Posted 08/01/2014 - 11:44
Thanks John, I have the rings for the light, but they won't fit the K mount on the back of the lens, so it's that interface I'm looking for.

Matt, yes I could go the DIY route if I have to, I was hoping someone made one to save me having to get 'creative'
Pete

Pentax K-3, Pentax K-x, DAL 18-55 WR, DAL 18-55, DA 50-200 WR, DAL 50-200, Sigma 70-300mm APO Macro DG, Battery Grip, Metz Mecablitz 48 AF-1, FluCard.

MattMatic

Link Posted 08/01/2014 - 11:57
If you used a M42 screw thread lens reversed then you just need a threaded adapter

Also, see this thread

Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)

SteveEveritt

Link Posted 08/01/2014 - 14:34
I used the 13mm section of a set of tubes glued to a 58mm filter with the glass removed, works a treat
My Flickr link

"Life is what happens to you while you're busy making other plans" (John Lennon)

Mannesty

Link Posted 08/01/2014 - 14:48
Pentax used to sell one, but I've never ever seen one advertised for sale, anywhere.

I made mine from an old manual extension tube and one of my many redundant filters.

I removed the female bayonet mount from the extension tube, removed the glass from the filter, and glued them together with araldite.

The only issue doing it this way is that the female K mount does not lock on to the lens mount. Perhaps a better solution is to use a complete, but thin, extension tube if you want a DIY solution, like Steve has said.
Peter E Smith

My flickr Photostream
Last Edited by Mannesty on 08/01/2014 - 14:59

Mannesty

Link Posted 08/01/2014 - 14:52
MattMatic wrote:
Also, see this thread

Matt

Thanks Matt, I posted this a few years ago . . .
Peter E Smith

My flickr Photostream

Mannesty

Link Posted 08/01/2014 - 15:02
johnriley wrote:
Ring lights are usually supplied with adapter rings, so if you don't have the rings why not try SRB Griturn who make all sorts of rings and adapters.

Try and pay attention JR, the OP wants to mount the ring flash on the bayonet mount end of a reversed lens.
Peter E Smith

My flickr Photostream

Mannesty

Link Posted 08/01/2014 - 15:07
Here's the Pentax version, it's called a "Reverse Ring Light Holder K" :-






Peter E Smith

My flickr Photostream

MattMatic

Link Posted 08/01/2014 - 17:13
Finding one could be difficult...

Here's a DIY one using the end of an extension tube! (and here on PUF)

That's not a bad idea!
Matt
http://www.mattmatic.co.uk
(For gallery, tips and links)
Last Edited by MattMatic on 08/01/2014 - 17:14

handlep

Link Posted 08/01/2014 - 17:13
Ah, that's the little devil Peter, thank you. None available it seems, so I guess I'll be going the DIY route. Many thanks everyone for your help.
Pete

Pentax K-3, Pentax K-x, DAL 18-55 WR, DAL 18-55, DA 50-200 WR, DAL 50-200, Sigma 70-300mm APO Macro DG, Battery Grip, Metz Mecablitz 48 AF-1, FluCard.

Mannesty

Link Posted 08/01/2014 - 23:34
MattMatic wrote:
Here's a DIY one using the end of an extension tube! (and here on PUF)

The eagle-eyed among us will notice that the PUF member Mayday = the PentaxForums member CertEdFriday. Mayday posted the same images in my thread in 2010. Good of him to credit me on PentaxForums with the idea, but I think his version is better than mine simply because the locking mechanism remains intact.
Peter E Smith

My flickr Photostream
Last Edited by Mannesty on 08/01/2014 - 23:35

Daniel Bridge

Link Posted 10/01/2014 - 01:17
MattMatic wrote:
Finding one could be difficult...

Would you believe I'm actually holding one as I type this? I got it in a job lot of flash gear, with a ringflash. Maybe I should stick it on ebay...

The only reference I found to it at the time was an old listing on an Aus website.

Dan
K-3, a macro lens and a DA*300mm...

handlep

Link Posted 10/01/2014 - 10:14
Dan, is that an original Pentax one?
Pete

Pentax K-3, Pentax K-x, DAL 18-55 WR, DAL 18-55, DA 50-200 WR, DAL 50-200, Sigma 70-300mm APO Macro DG, Battery Grip, Metz Mecablitz 48 AF-1, FluCard.
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