Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
12-19-2008, 11:43 AM   #16
Pentaxian
Moderator Emeritus




Join Date: May 2007
Location: Edmonton Alberta, Canada
Photos: Gallery | Albums
Posts: 10,648
This is sorta going sideways. I'm not challenging you Newarts. The lenses you listed (I have a couple of them) are fine with the mode you suggest and that's the way to go. The 28 and 55 in the OP's post should work this way also. The 105mm won't it's too small (diameter) and the locking pin, electrical contacts are left exposed. That's why i recomend the Pentax adapter for that lens. It's such a good lens, it's worth the trouble.

12-19-2008, 02:30 PM   #17
Pentaxian
wildman's Avatar

Join Date: Jun 2008
Location: Flyover America
Posts: 4,307
Original Poster
A quick and dirty shot with the 105mm using a T ring (right thread size wrong thread pitch but it kind of works) only focus' around 3 feet.

Ordered three of the adapters you recommend but from Adorama.
I'm assuming these will give focus at infinity?

Thanks
Wildman

Last edited by wildman; 12-26-2008 at 01:00 PM.
12-19-2008, 02:38 PM   #18
Pentaxian
Moderator Emeritus




Join Date: May 2007
Location: Edmonton Alberta, Canada
Photos: Gallery | Albums
Posts: 10,648
As long as they don't have the collars, they should work.
12-19-2008, 03:11 PM   #19
Inactive Account




Join Date: Dec 2008
Location: Ames, Iowa, USA
Photos: Albums
Posts: 2,965
QuoteOriginally posted by Peter Zack Quote
As long as they don't have the collars, they should work.
If they cost 12.95USD that's where I got them too!

12-19-2008, 03:26 PM   #20
Pentaxian
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 4,814
QuoteOriginally posted by wildman Quote
OK...

First of all it is VERY important to me to simply have ALL the lens' converted over PERMANENTLY to a K mount...

Given all that is the Pentax adapter still the only way to go?
If not what specifically would you recommend?
If yes than I'll go with Pentax if I'm convinced I really have to.
Also can the adapter by set up so once the lens is snapped in it is right side up? - So you can read the settings from the top down and not rotated out of view?

Thanks to all
The genuine adapter has the best machining, so it fits the camera and the threads start and finish in the right place. I have a mix of other adapters and they work OK too. One of them needed some filing to work well. I hunt up the genuine adapters for long telephotos just for extra insurance.

The adapted lenses normally end up oriented correctly. They were built that way for the screw-mount cameras. Sometimes the popup flash makes it harder to see the lens markings. Some adapters can have their threads started a few degrees off, so the lens is tilted a bit.

For one of those lenses, you probably can't get the camera's lens locking pin to engage. All of the 105mm Taks that I've seen (4 models) have a tapered base that doesn't extend very much past the adapter. This isn't a big deal, and the lenses are worth the trouble. Your other two have larger bases. I have wondered whether the infinity focus can be adjusted far enough to allow a flanged adapter for my 105mm, but never tried it.
12-19-2008, 04:38 PM   #21
Veteran Member




Join Date: Mar 2008
Location: Auckland
Posts: 553
QuoteOriginally posted by wildman Quote
When I grab a lens out in the field I want to know it's ready to go without loosing time messing about with additional hardware and trying to remember what lens I last used that had the adapter on or to find I forgot to bring the lens with the adapter on etc - just grab it and use it.
An unconverted adapter does not stay on the lens, it stays on the camera. The modifications people are describing are to convert them to stay on the lens.

My suggestion is this - try using just screw mount lenses for a session. That way you only need one adapter, and there's no fussing around or trying to convert adapters so they can stay on the lens. Your adapter can just stay on the camera, and you can change lenses as you like, simple, so fuss.
12-19-2008, 04:45 PM   #22
Pentaxian
Just1MoreDave's Avatar

Join Date: Feb 2007
Location: Aurora, CO
Photos: Gallery | Albums
Posts: 4,814
QuoteOriginally posted by cpopham Quote
My suggestion is this - try using just screw mount lenses for a session. That way you only need one adapter, and there's no fussing around or trying to convert adapters so they can stay on the lens. Your adapter can just stay on the camera, and you can change lenses as you like, simple, so fuss.
This is a good idea because there's more involved than just changing lenses. The different types all work differently, and it's not that easy to keep track of the different methods. With a decent set to work with (which we have here), you'll be more efficient with only screw-mounts. Add in other lenses when the M42 methods are more practiced.
12-19-2008, 06:23 PM   #23
Inactive Account




Join Date: Dec 2007
Location: Santa Teresa, New Mexico
Photos: Gallery
Posts: 1,130
QuoteOriginally posted by wildman Quote
A quick and dirty shot with the 105mm using a T ring (right thread size wrong thread pitch but it kind of works) only focus' around 3 feet.
Keep it up and you have a very good probability of ruining the threads on that lens.

QuoteOriginally posted by wildman Quote
Ordered three of the adapters you recommend but from Adorama.
I'm assuming these will give focus at infinity?
That is exactly what I purchased first, a Bower brand - the Pentax on line store was OUT OF STOCK. Dang near couldn't get that thing off the camera. So what did I do? Called the seller (it wasn't Adorama) and they sent me a second adapter at no charge. Guess what? It was NO better than the first one. I had read a whole bunch of threads here and they all said get the GENUINE PENTAX adapter. but I had my new camera and some old lenses and I wanted to get the deal done NOW. To make a long story a little shorter, the Pentax on line store got the adapter back in stock, I got one, and I now live in a house with a white picket fence, the greenest grass in the neighborhood, and a songbird in every tree. And I have a few more Super Tak lenses.

12-19-2008, 11:32 PM   #24
Site Supporter
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 26,158
QuoteOriginally posted by wildman Quote
...T ring (right thread size wrong thread pitch but it kind of works)...
I cringed when I read that. The threads are often made out of fairly mild metal and if cross-threaded will be permanently damaged.

BTW...Excellent sharpness and color on that leaf. Just promise me that you will wait until you get your adapters before you play any more!

Steve
12-20-2008, 12:40 AM   #25
Veteran Member
Mike Cash's Avatar

Join Date: Jan 2007
Location: Japan
Photos: Gallery
Posts: 6,952
QuoteOriginally posted by stevebrot Quote
I cringed when I read that. The threads are often made out of fairly mild metal and if cross-threaded will be permanently damaged.
Close examination of the adapter and the lens should reveal that whichever had the harder metal became either a tap or a die and ripped a new set of threads onto the softer metal.

I cringed just as hard as you did.
12-20-2008, 12:44 AM   #26
Veteran Member
Mike Cash's Avatar

Join Date: Jan 2007
Location: Japan
Photos: Gallery
Posts: 6,952
QuoteOriginally posted by wildman Quote
OK...

First of all it is VERY important to me to simply have ALL the lens' converted over PERMANENTLY to a K mount. When I grab a lens out in the field I want to know it's ready to go without loosing time messing about with additional hardware and trying to remember what lens I last used that had the adapter on or to find I forgot to bring the lens with the adapter on etc - just grab it and use it.
I feel like weeping.

Just sell the Takumars to someone who will love them and buy yourself a nice K-mount 18-250 you can weld to your camera.
12-20-2008, 05:44 AM   #27
Pentaxian
wildman's Avatar

Join Date: Jun 2008
Location: Flyover America
Posts: 4,307
Original Poster
Ok.

I got it figured out.
Just going to get one Pentax adapter and live with that.
Will not be as useful as I hoped but it's worth a 30 buck apapter.

Thanks,
Wildman
12-20-2008, 08:11 AM   #28
Pentaxian
Moderator Emeritus




Join Date: May 2007
Location: Edmonton Alberta, Canada
Photos: Gallery | Albums
Posts: 10,648
QuoteOriginally posted by Mike Cash Quote
I cringed just as hard as you did.
Likewise. I did too.

My position was as well, that it's worth the time and effort to use one Pentax adapter to switch lenses when shooting M42's. As I said earlier, I don't agree that they should be modified either since they are such fine pieces of glass. Oh well it's his stuff.
12-20-2008, 08:20 AM   #29
Pentaxian
jsherman999's Avatar

Join Date: Dec 2007
Photos: Gallery
Posts: 8,228
QuoteOriginally posted by Mike Cash Quote
I feel like weeping.

Just sell the Takumars to someone who will love them and buy yourself a nice K-mount 18-250 you can weld to your camera.



rofl



.
............
12-20-2008, 08:26 AM   #30
Pentaxian
jsherman999's Avatar

Join Date: Dec 2007
Photos: Gallery
Posts: 8,228
QuoteOriginally posted by wildman Quote
Ok.

I got it figured out.
Just going to get one Pentax adapter and live with that.
Will not be as useful as I hoped but it's worth a 30 buck apapter.

Thanks,
Wildman
Wildman, you'll find it's pretty easy. I actually started out like you, wanting to convert all my m42's to K with dedicated adapters, then decided it wasn't worth the cost/effort, because the Pentax adapter was so easy.

Plus, you'd have to get new K-mount rear caps for every lens then - screw-mount rear caps won't go on a K-converted lens.

Your Taks want to be Taks. They'll bring you the images better if they aren't 'corsetted'.


.
Reply

Bookmarks
  • Submit Thread to Facebook Facebook
  • Submit Thread to Twitter Twitter
  • Submit Thread to Digg Digg
Tags - Make this thread easier to find by adding keywords to it!
adapters, k-mount, pentax lens, screw, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
adapters for non-K-mount lenses to Pentax K-mount DSLRs: new dimensions for LBA Douglas_of_Sweden Pentax Camera and Field Accessories 151 11-01-2014 09:26 AM
Screw-on wide angle lens adapters? kmahoney Pentax SLR Lens Discussion 2 08-02-2008 07:00 PM
For Sale - Sold: FA: Original PENTAX Screw Mount to K Mount Adapter M42 HogRider Sold Items 0 10-21-2007 02:12 PM
Pentax brand screw-to-k adapters still available tranq78 Pentax Camera and Field Accessories 14 10-03-2007 05:57 PM



All times are GMT -7. The time now is 07:58 PM. | See also: NikonForums.com, part of our network of photo forums!
  • Red (Default)
  • Green
  • Gray
  • Dark
  • Dark Yellow
  • Dark Blue
  • Old Red
  • Old Green
  • Old Gray
  • Dial-Up Style
Hello! It's great to see you back on the forum! Have you considered joining the community?
register
Creating a FREE ACCOUNT takes under a minute, removes ads, and lets you post! [Dismiss]
Top