View previous topic :: View next topic |
Author |
Message |
tromboads
Joined: 29 May 2012 Posts: 1655 Location: Melbourne AU
Expire: 2015-10-01
|
Posted: Fri Nov 20, 2015 2:53 am Post subject: Heavy narrow M42 Lens in a K Mount |
|
|
tromboads wrote:
I'm thinking about you Tair 3
I have a nice copy and I hardly ever use it because as it's mounting surface is narrow, when screwing it into a M42 - K-Mount it does not really sit against the flange of the camera body at all, and instead, all the weight is loaded on the mount. As such it wobbles a little bit as is the slight tolerance differences between the mount.
I note with other M42 lens's that protrude over the flange if you will, the rest of the mount on the camera surface acts as friction to stop any slight wobbles, make it feel all nice and stiff.
Still with me here?
Has anyone bothered to think of a way to have it sit nice and flush.
My Tair 3 is an older M39 version, that has had a M42 adaptor screwed on, which then I use with a K mount adaptor. I.e the middle one of the 3 here. See what I mean by narrow?
https://www.flickr.com/photos/jcw1967/11869239084 |
|
Back to top |
|
|
luisalegria
Joined: 07 Mar 2008 Posts: 6602 Location: San Francisco, USA
Expire: 2018-01-18
|
Posted: Fri Nov 20, 2015 5:52 am Post subject: |
|
|
luisalegria wrote:
You can get a flanged M42-PK mount.
That may help.
I have picked up several, they are useful for various things.
You will add a millimeter or so to the back focus and maybe lose infinity, but maybe not, as these lenses often go beyond infinity anyway. _________________ I like Pentax DSLR's, Exaktas, M42 bodies of all kinds, strange and cheap Japanese lenses, and am dabbling in medium format/Speed Graphic work. |
|
Back to top |
|
|
tb_a
Joined: 26 Jan 2010 Posts: 3678 Location: Austria
Expire: 2019-08-28
|
Posted: Fri Nov 20, 2015 10:00 am Post subject: |
|
|
tb_a wrote:
Don't forget that old M39 Zenit lenses are designed for only 45.2 mm register distance. With normal M42 adapters you may have difficulties to reach infinity.
So on Pentax those lenses are of limited usage anyway (45.46 mm). My M39/Zenit lenses don't reach infinity if adapted like M42 lenses only with step-up ring (M39 to M42). I'm using therefore the Zenit extension tube on a M39 adapter instead to cope with that problem. A flanged adapter as suggested by Luis may increase this problem even further. _________________ Thomas Bernardy
Manual focus lenses mainly from Minolta, Pentax, Voigtlaender, Leitz, Topcon and from Russia (too many to be listed here). |
|
Back to top |
|
|
tromboads
Joined: 29 May 2012 Posts: 1655 Location: Melbourne AU
Expire: 2015-10-01
|
Posted: Fri Nov 20, 2015 12:18 pm Post subject: |
|
|
tromboads wrote:
Ah of course.
My copy spins past infinity currently, ill find a flanged adaptor.
I had forgot they were floating around. |
|
Back to top |
|
|
Lloydy
Joined: 02 Sep 2009 Posts: 7788 Location: Ironbridge. UK.
Expire: 2022-01-01
|
Posted: Fri Nov 20, 2015 1:51 pm Post subject: |
|
|
Lloydy wrote:
Treat it like a lens with a camera on the back of it, use the tripod ring and a tripod. Or, hand held support the lens primarily if the camera is lighter than the lens. _________________ LENSES & CAMERAS FOR SALE.....
I have loads of stuff that I have to get rid of, if you see me commenting about something I have got and you want one, ask me.
My Flickr https://www.flickr.com/photos/mudplugga/
My ipernity -
http://www.ipernity.com/home/294337 |
|
Back to top |
|
|
marcusBMG
Joined: 07 Dec 2012 Posts: 1316 Location: Conwy N Wales
|
Posted: Fri Nov 20, 2015 1:58 pm Post subject: |
|
|
marcusBMG wrote:
luisalegria wrote: |
You can get a flanged M42-PK mount.
|
+1
I have both the thinner cheap black ones and the better quality plated brass ones for exactly this. Use them also with eg helios 44 (tho then infinity focus is more of an issue). infinity focus with a 300mm - you are unlikely to be bothered unless you are trying for eg moon shots. _________________ pentax ME super (retired)
Pentax K3-ii; pentax K-S2; Samsung NX 20; Lumix G1 + adapters;
Adaptall collection (proliferating!) inc 200-500mm 31A, 300mm f2.8, 400mm f4.
Primes: takumar 55mm; smc 28mm, 50mm; kino/komine 28mm f2's, helios 58mm, Tamron Nestar 400mm, novoflex 400mm, Vivitar 135mm close focus, 105mm macro; Jupiter 11A; CZJ 135mm.
A classic zoom or two: VS1 (komine), Kiron Zoomlock... |
|
Back to top |
|
|
tromboads
Joined: 29 May 2012 Posts: 1655 Location: Melbourne AU
Expire: 2015-10-01
|
Posted: Mon Nov 23, 2015 3:53 am Post subject: |
|
|
tromboads wrote:
This forum does it again.
Flanged adapter arrived and yes, it's great with the Tair 3
I'll test the moon later to see how much I've let go, but initially seems great for what I want, that is stalking around the bush tracks whilst walking the dog looking for Supreme Fairy Wrens
Thanks all |
|
Back to top |
|
|
tromboads
Joined: 29 May 2012 Posts: 1655 Location: Melbourne AU
Expire: 2015-10-01
|
Posted: Mon Nov 23, 2015 6:18 am Post subject: |
|
|
tromboads wrote:
Well I missed the Male but I found his girlfriend. , Female supreme fairy wren. Thank you Tair 3
Exit would have said f4.5 on a K5, iso400, S=1/3000th, and focused probably to about 4, 5m
This was luck. The Tair 3 is hard to work with, you really have to commit to the shot before it's raised to your eye, in both aperture / depth you wish, and focus. I had forgotten how many rotations it can take, it makes focusing at closer distances a breeze but switching between near and far is an issue
More adventures needed.
Oh point of this thread, the flanged adaptor worked a breeze. It feels 500% better then it did with a "Proper" pentax adapter. |
|
Back to top |
|
|
tromboads
Joined: 29 May 2012 Posts: 1655 Location: Melbourne AU
Expire: 2015-10-01
|
Posted: Fri Dec 04, 2015 10:06 am Post subject: |
|
|
tromboads wrote:
No really the Tair 3 is amazing. Everything wide open.
Click 0
Click 1
Click 2
Mohamed why am I telling you lot this. You are well aware!
TAKE NOT CASUAL GOOGLE SEARCHER! BUY A TAIR 3! |
|
Back to top |
|
|
marcusBMG
Joined: 07 Dec 2012 Posts: 1316 Location: Conwy N Wales
|
Posted: Fri Dec 04, 2015 1:59 pm Post subject: |
|
|
marcusBMG wrote:
Yes those are good I particularly like no 3, and your pics are a good illustration of wide open performance.
Are you shooting in RAW?
Personally I tend to always stop down at least a half stop because on just about every tp I've tried the benefit in IQ is visible. _________________ pentax ME super (retired)
Pentax K3-ii; pentax K-S2; Samsung NX 20; Lumix G1 + adapters;
Adaptall collection (proliferating!) inc 200-500mm 31A, 300mm f2.8, 400mm f4.
Primes: takumar 55mm; smc 28mm, 50mm; kino/komine 28mm f2's, helios 58mm, Tamron Nestar 400mm, novoflex 400mm, Vivitar 135mm close focus, 105mm macro; Jupiter 11A; CZJ 135mm.
A classic zoom or two: VS1 (komine), Kiron Zoomlock... |
|
Back to top |
|
|
uddhava
Joined: 22 Aug 2012 Posts: 3072 Location: Hungary
Expire: 2021-06-21
|
Posted: Fri Dec 04, 2015 2:57 pm Post subject: |
|
|
uddhava wrote:
Congratulations for fixing the problem. Nice shots! |
|
Back to top |
|
|
tromboads
Joined: 29 May 2012 Posts: 1655 Location: Melbourne AU
Expire: 2015-10-01
|
Posted: Fri Dec 04, 2015 9:22 pm Post subject: |
|
|
tromboads wrote:
Yes to think The Tair only ever was previously used whilst on tripod looking at a moon! shame on me
Yes they were translated from raw, and yes I imagine there would be a benefit from stopping down slightly. Still happy with this huge junk of thing.
Just nobody tell me similar results could be had from a Pentax M 300mm / Tamron 300mm etc etc which are half the weight of the Tair |
|
Back to top |
|
|
Oldhand
Joined: 01 Apr 2013 Posts: 6002 Location: Mid North Coast NSW - Australia
|
Posted: Fri Dec 04, 2015 9:26 pm Post subject: |
|
|
Oldhand wrote:
Good job Daniel
Nice results - and yes, it is a tank of a lens.
Rumour has it that casings were made from recycled T34s |
|
Back to top |
|
|
tromboads
Joined: 29 May 2012 Posts: 1655 Location: Melbourne AU
Expire: 2015-10-01
|
Posted: Fri Dec 04, 2015 9:31 pm Post subject: |
|
|
tromboads wrote:
These rumours just make it better |
|
Back to top |
|
|
|
|
You cannot post new topics in this forum You cannot reply to topics in this forum You cannot edit your posts in this forum You cannot delete your posts in this forum You cannot vote in polls in this forum
|