Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-04-2010, 03:58 PM   #16
Veteran Member
RioRico's Avatar

Join Date: Jun 2008
Location: Limbo, California
Posts: 11,263
Original Poster
QuoteOriginally posted by Ira Quote
I hate duct tape and only use duck tape.
I've taped a few ducks in my day.
(Don't ask what I do in my night.)
When I tape a duck, it want it to STAY taped.
Too many ducks come untaped at odd times.
I really hate when that happens.
Especially without a camera near.
Superglue hold the feathers better.

06-05-2010, 09:19 PM   #17
Otis Memorial Pentaxian
stevebrot's Avatar

Join Date: Mar 2007
Location: Vancouver (USA)
Photos: Gallery | Albums
Posts: 42,007
QuoteOriginally posted by RioRico Quote
I've taped a few ducks in my day.
(Don't ask what I do in my night.)
When I tape a duck, it want it to STAY taped.
Too many ducks come untaped at odd times.
I really hate when that happens.
Especially without a camera near.
Superglue hold the feathers better.
When I tape 'em, they generally stay taped...


Steve
06-05-2010, 09:30 PM   #18
Moderator
Site Supporter
Blue's Avatar

Join Date: Jun 2008
Location: Florida Hill Country
Photos: Gallery | Albums
Posts: 17,377
These people make a custom version of the m42-k adapter that deals with auto ap lenses that lack an A-M switch. The price has gone up recently. Since I only have one of these lenses, I haven't gotten around to dealing with this issue.

M42 lenses on Pentax K



QuoteOriginally posted by Nesster Quote
There is an adapter with an inner flange to hold the pin in (Pentax never did this, as they had the A/M switch, but Contax/Yashica has the flange in theirs).

Manual Focus Lenses :: View topic - Pentax-k /m42 adapter with inner flange
Mamiya's m42 adapter had an inner flange to deal with this to, except it was actually sort of floating spring steel.

Last edited by Blue; 06-05-2010 at 09:36 PM.
11-09-2010, 10:47 PM   #19
Veteran Member




Join Date: Dec 2008
Location: Roodepoort, South Africa
Photos: Gallery | Albums
Posts: 3,561
I've recently posted these pics in a post/article about a Tokina EL28/2.8 which is auto-only. When removing the back of the lens with the aperture activation mechanism, the aperture closes making it a manual lens.




Removing the full copper mechanism in the second picture makes this lens a manual lens.

11-10-2010, 06:24 AM   #20
Inactive Account




Join Date: Oct 2010
Location: Texas
Photos: Gallery
Posts: 33
I contacted SRB-Griturn and ask them about the adapter with the flange. They say theirs comes with a flange but may not depress the pin on some lenses all the way.

I found this one. 黎环m42-PK无簧片第二代改口环紫砂黑 无限远合焦 - 淘宝网 It received a very good review on an other site. It does not have the locking tab but the person that had it said it went in the camera very well. It is installed and removed on the lens with the plastic cap provided. I do not read Chinese but I have a client from China and she told me the cost and ordered it for me. With shipping it was $25 US. I have the Pentax adapter but I do have some M42 lenses that do not have the manual switch. I will keep people updated when I get the adapter and do a mini review.

Al
11-10-2010, 07:13 AM   #21
Veteran Member




Join Date: Oct 2010
Location: Finland
Photos: Albums
Posts: 3,196
Super glue seems to break down in higher temperatures or at least my past attempts to fix things @80 C or so for hours (sauna) at a time have failed :-)
11-10-2010, 02:00 PM   #22
Veteran Member
Lloydy's Avatar

Join Date: Aug 2007
Location: Shropshire, UK
Posts: 1,114
Another vote for putting a plastic sleeve over the pin on these type of lenses, even if it means taking the back off.

I bought a cheap M42 Super Paragon 135mm last week with no 'auto - man' switch like found on Tak's and Helios amongst others, the pin was the only method of operating the aperture.

Being lazy and not really wanting to take the rear of the lens apart I thought I would be clever and rotate a pressed alloy top hat shaped trim plate on the back of the lens that had a cutout for the aperture pin. I thought that by rotating it one screw hole the thin plate would hold the pin down.

It did, but too bloody well! it pushed the pin too far in and dislodged a spring in the levers rendering the aperture useless.
So I had to take the back off, then spend a fun hour or so figuring out where the spring should fit, and more importantly, how the hell to get it back in without a major stripdown!

I got it back in and working, and then sleeved the pin with the old faithful bit of Qtip.

Do it right, and do it once.

05-21-2020, 01:40 AM   #23
New Member




Join Date: Nov 2018
Posts: 16
QuoteOriginally posted by hinman Quote
Yes, that is one other solution. I have a copy of the adapter from Alex (hk300 in mflenses).









The extra inner flange will depress the pin



more in M42 adapter for auto-mount m42 lens


The adapter works fine to a certain degree if your lens is small. With longer and heavier lens, I find the adapter not locking the lens securely in place. The adapter has its value but like other 3rd party adapters, the material and build is not as good as the genuine Pentax adapter.

Thanks,
Hin
What brand and type number is this adapter? I have had no succes in finding one so far. Thanks in advance!
05-22-2020, 12:34 AM   #24
Site Supporter
Site Supporter
K(s)evin's Avatar

Join Date: Sep 2010
Location: Colorado
Posts: 476
This thread is over a decade old. You'll probably have better luck starting a new one.
05-22-2020, 04:45 AM - 1 Like   #25
Site Supporter
Site Supporter
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 17,868
QuoteOriginally posted by 321pentaprism Quote
What brand and type number is this adapter? I have had no succes in finding one so far. Thanks in advance!
There are several Chinese M42 adaptors with a lip that will activate the aperture pin for auto m42 lenses, but I prefer to slop a sleeve over the pin, just behind the base of the lens, as I am not concerned with using my lenses on a screw mount body.

Here is a shot of an adaptall M42 mount with the mod being proposed.

https://www.pentaxforums.com/forums/58-troubleshooting-beginner-help/115841-...ml#post1199619

The mod is simply take about 3 mm of a ball point pen refil tube, and slit it down one side so it can slide over the pin

Last edited by Lowell Goudge; 05-22-2020 at 04:51 AM.
05-22-2020, 02:08 PM   #26
Site Supporter
Site Supporter




Join Date: May 2014
Location: Minnesota
Photos: Gallery | Albums
Posts: 2,034
The only time I had a pin sticking was with my 135 mm f3.5 and that's because I was using a Non-Pentax adapter. All my other M42 lenses work with no problems. I have about 7 of them all Takumars.
05-22-2020, 02:29 PM   #27
Moderator
Not a Number's Avatar

Join Date: Mar 2012
Location: Venice, CA
Posts: 10,508
Why not tack the pin down with a bit of hot glue? You can peel the glue off if you want to use the pin later. If you cleaned any dirt, grease or oil off the pin and surrounding are these should be no worries of the blob of glue dropping off.
05-22-2020, 04:25 PM - 1 Like   #28
Pentaxian
mikeSF's Avatar

Join Date: Jan 2009
Location: East Bay Area, CA
Photos: Gallery
Posts: 6,611
Holy resurrected threads! This is from 10 years ago when Pentax was doomed. Has anyone checked in on Pentax today? Pentax?
05-22-2020, 04:36 PM - 1 Like   #29
Site Supporter
Site Supporter
Lowell Goudge's Avatar

Join Date: Jan 2007
Location: Toronto
Photos: Gallery | Albums
Posts: 17,868
QuoteOriginally posted by mikeSF Quote
Holy resurrected threads! This is from 10 years ago when Pentax was doomed. Has anyone checked in on Pentax today? Pentax?
Pentax was doomed When they changed to k mount, then when I bought my PZ1, my *istD, K10, K7, K5, and K1 MK2. Sure they may be doomed at some point, but at the rate they are going they will out live me, and that抯 good enough I think.

In that time canon has abandoned its lens mount not once, but twice, and back compatibility for Nikon was yes of course you can mount a lens but with few exceptions the only function offered was the shutter would trip.

I for one think they have done alright
05-25-2020, 12:46 AM - 1 Like   #30
Site Supporter
Site Supporter
K(s)evin's Avatar

Join Date: Sep 2010
Location: Colorado
Posts: 476
QuoteOriginally posted by K(s)evin Quote
This thread is over a decade old. You'll probably have better luck starting a new one.
Or not.
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!
a/m, aperture, bodies, control, k-mount, lenses, m42, pentax lens, pin, pins, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Aperture pin on Helioses (Heliii?) MrCynical Pentax SLR Lens Discussion 11 03-01-2010 06:51 PM
M42 Voigtlander 90 Aperture Pin Problem Sirfishalot Pentax SLR Lens Discussion 4 01-15-2010 02:33 PM
For Sale - Sold: Pentacon 200mm f/4 Prime, auto/manual aperture, M42 mount, excellent condition wallyb Sold Items 7 07-15-2009 09:53 PM
Aperture pin problem skb0 Pentax SLR Lens Discussion 1 09-11-2008 01:34 PM



All times are GMT -7. The time now is 06:28 AM. | See also: NikonForums.com, CanonForums.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