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Oldhand
Joined: 01 Apr 2013
Posts: 6005
Location: Mid North Coast NSW - Australia
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 Posted: Mon Jan 27, 2014 11:41 pm Post subject: Vivitar 105/2.8 advice please. |
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Oldhand wrote:
This is a very nice lens and easy to use, with excellent results wide open.
Only problem I am having is that it does not want to change aperture from wide open to anything else.
It has a manual switch on the side, but this appears to act like a wheel for DOF preview and it will not lock the aperture in place, reverting to fully open when finger pressure on the wheel is released.
I don't mind shooting fully open as the results are good - even though the DOF is shallow, but it would be nice to have a choice of some other aperture settings.
Puzzled
OH
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ManualFocus-G
Joined: 29 Dec 2008
Posts: 6622
Location: United Kingdom
Expire: 2014-11-24
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| Posted: Mon Jan 27, 2014 11:49 pm Post subject: |
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ManualFocus-G wrote:
I had exactly the same problem with my TX mount. I'm not sure if a spring was missing, or whether I was missing something 
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Mon Jan 27, 2014 11:52 pm Post subject: |
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luisalegria wrote:
I have this lens too.
Yes, this is a problem with the T4 M42 adapter. Your lens uses the T4 system of interchangeable lens mounts.
The M42 mount of this series had that rather inadequate wheel thing instead of a proper manual-auto switch.
When I first started with the T4 system I hacked (I opened it) one of my M42 T4 adapters so that, in effect, the M42 pin was always depressed, so when that adapter was installed on a T4 lens aperture was fully manual.
Later I bought some M42-PK adapters with inner rings that pressed the M42 pin so that fix was no longer necessary.
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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. |
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Attila
Joined: 24 Feb 2007
Posts: 57865
Location: Hungary
Expire: 2025-11-18
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| Posted: Tue Jan 28, 2014 12:04 am Post subject: |
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Attila wrote:
+1 on above take adapter off, simple screw it off and look how it works
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Oldhand
Joined: 01 Apr 2013
Posts: 6005
Location: Mid North Coast NSW - Australia
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| Posted: Tue Jan 28, 2014 12:25 am Post subject: |
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Oldhand wrote:
Thanks for the replies.
It is a very good lens wide open - I am looking forward to some shots at smaller apertures.
Here are some images, all shot @ f2.8
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hifisapi
Joined: 25 Sep 2012
Posts: 941
Location: USA
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| Posted: Tue Jan 28, 2014 1:52 am Post subject: |
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hifisapi wrote:
why cant you just use the switch to close the aperture just at the time of exposure?
I realize it would be easier to just have a manual aperture but using the switch shouldn't be impossible.
_________________
===========
ACQUIRED OVER 30 YEARS:
Cameras: DSLR=Pentax istDS FILM=Pentax SP, SP-F, ESII, SP1000, KX, K2
Lenses : Pentax M42 = Super Multi Coated Takumars 50/1.4 55/1.8 100/4-BELLOWS 500/4.5 1000/8 135-600/6.7 Pentax PK= SMC Pentax-Ks K17/4-FF Fisheye K18/3.5 K20/4 K24/3.5 K28/3.5 K28/2 K35/3.5 K35/2 K50/1.2 K50/1.4K 50/4-MACROK 55/1.8 K85/1.8 K100/4-MACRO K100/4-BELLOWS K105/2.8 K120/2.8 K135/3.5 K135/2.5 K150/4 K200/4 K400/5.6 K45-125/4K 85-210/4.5 Pentax PKM = SMC Pentax-M M40/2.8-Pancake M50/1.4 M75-150/4 M80-200/4.5 Pentax PKA= SMC Pentax-A A15/3.5 A50/2.8-MACRO A28/2 A35/2 A50/1.4 A135/2.8 A200/4 A*300/4 A35-105/3.5 A24-50/4 A70-210/4 TAMRON AD2= SP80-200/2.8 SP180/2.5 TOKINA AT-X PK= ATX28-85/3.5-4.5 ATX35-70/2.8 ATX60-120/2.8 ATX80-200/2.8 ATX100-300/4 ATX90/2.5 MACRO KIRON-LESTER DINE PK = 105/2.8-MACRO VIVITAR PK = 135/2.8-MACRO 28-85/4 NOFLEXAR AUTOBELLOWS PK = 60/4 105/4 |
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Oldhand
Joined: 01 Apr 2013
Posts: 6005
Location: Mid North Coast NSW - Australia
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| Posted: Tue Jan 28, 2014 2:10 am Post subject: |
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Oldhand wrote:
| hifisapi wrote: |
why cant you just use the switch to close the aperture just at the time of exposure?
I realize it would be easier to just have a manual aperture but using the switch shouldn't be impossible. |
Yes, I have tried that but my fingers are thick and the switch resides right up against the camera body and it is near impossible for me to accomplish.
Maybe a flanged M42-PK adapter will work.
Cheers
OH |
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hifisapi
Joined: 25 Sep 2012
Posts: 941
Location: USA
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| Posted: Tue Jan 28, 2014 2:33 am Post subject: |
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hifisapi wrote:
| Oldhand wrote: |
| hifisapi wrote: |
why cant you just use the switch to close the aperture just at the time of exposure?
I realize it would be easier to just have a manual aperture but using the switch shouldn't be impossible. |
Yes, I have tried that but my fingers are thick and the switch resides right up against the camera body and it is near impossible for me to accomplish.
Maybe a flanged M42-PK adapter will work.
Cheers
OH |
another brute force solution is to super glue the pin down and you will have a permanently manual aperture lens.
careful not to use to much glue and keep the rear of the lens well ventilated when you do it to not fog the glass.
_________________
===========
ACQUIRED OVER 30 YEARS:
Cameras: DSLR=Pentax istDS FILM=Pentax SP, SP-F, ESII, SP1000, KX, K2
Lenses : Pentax M42 = Super Multi Coated Takumars 50/1.4 55/1.8 100/4-BELLOWS 500/4.5 1000/8 135-600/6.7 Pentax PK= SMC Pentax-Ks K17/4-FF Fisheye K18/3.5 K20/4 K24/3.5 K28/3.5 K28/2 K35/3.5 K35/2 K50/1.2 K50/1.4K 50/4-MACROK 55/1.8 K85/1.8 K100/4-MACRO K100/4-BELLOWS K105/2.8 K120/2.8 K135/3.5 K135/2.5 K150/4 K200/4 K400/5.6 K45-125/4K 85-210/4.5 Pentax PKM = SMC Pentax-M M40/2.8-Pancake M50/1.4 M75-150/4 M80-200/4.5 Pentax PKA= SMC Pentax-A A15/3.5 A50/2.8-MACRO A28/2 A35/2 A50/1.4 A135/2.8 A200/4 A*300/4 A35-105/3.5 A24-50/4 A70-210/4 TAMRON AD2= SP80-200/2.8 SP180/2.5 TOKINA AT-X PK= ATX28-85/3.5-4.5 ATX35-70/2.8 ATX60-120/2.8 ATX80-200/2.8 ATX100-300/4 ATX90/2.5 MACRO KIRON-LESTER DINE PK = 105/2.8-MACRO VIVITAR PK = 135/2.8-MACRO 28-85/4 NOFLEXAR AUTOBELLOWS PK = 60/4 105/4 |
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Tue Jan 28, 2014 3:13 am Post subject: |
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luisalegria wrote:
Its easier to remove the T4 mount and jam the pin linkage.
Less trouble than glue.
Better is a flanged adapter. This isn't the only M42 lens that could use it.
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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. |
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Lloydy
Joined: 02 Sep 2009
Posts: 7796
Location: Ironbridge. UK.
Expire: 2022-01-01
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| Posted: Tue Jan 28, 2014 10:55 am Post subject: |
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Lloydy wrote:
| luisalegria wrote: |
Its easier to remove the T4 mount and jam the pin linkage.
Less trouble than glue.
Better is a flanged adapter. This isn't the only M42 lens that could use it. |
I think that's possible in between the mount and lens, non destuctively? I'll have a look later on.
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Tue Jan 28, 2014 3:45 pm Post subject: |
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luisalegria wrote:
Its non destructive. All you need is a bit of wood, plastic or foam.
_________________
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. |
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ManualFocus-G
Joined: 29 Dec 2008
Posts: 6622
Location: United Kingdom
Expire: 2014-11-24
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| Posted: Tue Jan 28, 2014 7:30 pm Post subject: |
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ManualFocus-G wrote:
Looks pretty good. Plus we share the same kettle.
_________________
Graham - Moderator
Shooter of choice: Fujifilm X-T20 with M42, PB and C/Y lenses
See my Flickr photos at http://www.flickr.com/photos/manualfocus-g |
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Oldhand
Joined: 01 Apr 2013
Posts: 6005
Location: Mid North Coast NSW - Australia
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| Posted: Tue Jan 28, 2014 7:37 pm Post subject: |
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Oldhand wrote:
| ManualFocus-G wrote: |
| Looks pretty good. Plus we share the same kettle. |
It has an electronic whistle -haha
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vlousada
Joined: 11 Dec 2010
Posts: 345
Location: Portugal
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| Posted: Tue Jan 28, 2014 10:09 pm Post subject: |
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vlousada wrote:
A lot of good Infos in this thread.. 
Thanks
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konicamera
Joined: 03 May 2009
Posts: 746
Location: Warsaw, Poland
Expire: 2014-06-14
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| Posted: Tue Jan 28, 2014 10:52 pm Post subject: |
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konicamera wrote:
It's been many years since I used a M42 T4-mount lens and I may be wrong on this, but I seem to remember that not only the adapter needed to be precisely aligned when mounted onto the lens, but the aperture ring needed to be exactly at full aperture during the operation. I see that you can in fact reach full aperture, but perhaps the auto mechanism of the adapter is not linked properly. It's just a thought, but I seem to remember these alignment issues being quite tricky and as I had several T4 lenses but only one M42 adapter, I ran into them often.
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luisalegria
Joined: 07 Mar 2008
Posts: 6602
Location: San Francisco, USA
Expire: 2018-01-18
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| Posted: Tue Jan 28, 2014 11:03 pm Post subject: |
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luisalegria wrote:
Its not an alignment issue in this case. The problem is that the M42 T4 has a stop-down control that does not actually switch to manual mode, the moment you let go of it the lens goes back to wide open. This makes sense for a film camera with a proper M42 mount where you would use this feature just to check DOF, perhaps, and could count on the auto mechanism to actually stop down the lens, but is annoying on a DSLR that can't actually stop the lens down to shoot. With a DSLR you want to set the thing to f/5.6 (ex) and keep it there.
I have seen this sort of thing on several other M42 lenses, including Sigmas and some later Meyers.
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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. |
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konicamera
Joined: 03 May 2009
Posts: 746
Location: Warsaw, Poland
Expire: 2014-06-14
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| Posted: Tue Jan 28, 2014 11:12 pm Post subject: |
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konicamera wrote:
| luisalegria wrote: |
Its not an alignment issue in this case. The problem is that the M42 T4 has a stop-down control that does not actually switch to manual mode, the moment you let go of it the lens goes back to wide open. This makes sense for a film camera with a proper M42 mount where you would use this feature just to check DOF, perhaps, and could count on the auto mechanism to actually stop down the lens, but is annoying on a DSLR that can't actually stop the lens down to shoot. With a DSLR you want to set the thing to f/5.6 (ex) and keep it there.
I have seen this sort of thing on several other M42 lenses, including Sigmas and some later Meyers. |
I see. I perhaps had a TX in that case, because i don't remember that little wheel.
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bernhardas
Joined: 01 Jan 2013
Posts: 1432
Expire: 2017-05-23
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| Posted: Wed Jan 29, 2014 3:15 am Post subject: |
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bernhardas wrote:
edited |
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