Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
06-11-2007, 12:38 PM   #16
Veteran Member
Mr Hyde's Avatar

Join Date: May 2007
Location: NJ, USA
Posts: 761
You really didnt say what you were taking shots of when you were having this problem. The only time I had this problem was when I was trying to take close ups of a flower or an insect with the aperature wide open. I was holding the camera and as I was pressing the shutter, my body would move/sway and move the camera out of focus but it would take the shot anyway. I solved my problem with a tripod. I dont know if this is what you were refering to however.

06-11-2007, 02:18 PM   #17
Senior Member




Join Date: May 2007
Location: Phoenix
Photos: Albums
Posts: 100
Original Poster
MF/AF switch only impacts if I have a AF lens mounted.
06-11-2007, 02:25 PM   #18
Senior Member




Join Date: May 2007
Location: Phoenix
Photos: Albums
Posts: 100
Original Poster
The picture is about 30-40' away (just inside infinity), using an aperature of 1.9 - 2.5, low light situation. I should have about 3 - 4 feet of DOF to work with.

Anywho, the focus trap is what I'm trying to do but it isn't working (haven't tried the aluminum foil trick yet).

Thanks for all the suggestions everyone!
06-12-2007, 07:59 AM   #19
Senior Member




Join Date: Nov 2006
Location: Portland, Oregon
Photos: Gallery
Posts: 217
QuoteOriginally posted by varnco Quote
MF/AF switch only impacts if I have a AF lens mounted.
thats something wrong...

unless the M42 behave differently than M lenses, or there is some issue with the M42dapter...???

My K100D with M lenses, af.s selected, AF/MF switch set to AF, blocks the shutter until the camera detects focus.

you arent doing anything swrong that I can think of. you did try P,M and green modes??

sorry, I am stumped. it should work. try cleaning the contacts on the lens adapter and the camera mount? dont know why that would help or hurt though....

06-12-2007, 09:12 AM   #20
Veteran Member




Join Date: Sep 2006
Location: Göteborg, Sweden
Posts: 810
QuoteOriginally posted by varnco Quote
MF/AF switch only impacts if I have a AF lens mounted.
And that is why you have to try the method I described earlier.

Lol - This thread is getting a bit crazy: Nothing works and we see no picture of your adapter with a "small flange". If the camera mount contacts are covered with something that shortens them out it should either work or your camera is broken. Now what is it?

(I mention the adapter as a "small flange" adapter isn't a common adapter. The original (and the good third party ones) adapters have no flange at all. Adapters with flange may be made of a material not shortening the contacts, or they do shorten them. In both cases the flange will make your lenses unusable for normal shooting as they prohibit focusing to infinity.)
06-12-2007, 11:00 AM   #21
Senior Member




Join Date: May 2007
Location: Phoenix
Photos: Albums
Posts: 100
Original Poster
Yes, this thread is getting nutty, but I do appreciate all the tips.

I haven't had a chance to try the aluminum trick.

This is the adapter I have:
General Brand Pentax-K Body to Universal Lens Adapter

This is the lens I have:
Die Cast Pro - Super Takumar 85mm f/1.9 Index
06-12-2007, 03:09 PM   #22
Veteran Member




Join Date: Sep 2006
Location: Göteborg, Sweden
Posts: 810
Then you have an adapter which in generalis said to have no flange (meaning the whole of the adapter is flush in line with the camera lens mount. That's good.

And you have a lens which is black. Painted steel or anodized aluminium? In any case it probably doesn't make any electric contact to the lens mount. Compare that to standard Pentax K and M lenses and you'll understand why the alu folie trick is worth a try.
06-12-2007, 03:47 PM   #23
Veteran Member
rfortson's Avatar

Join Date: Sep 2006
Location: Houston TX
Photos: Gallery
Posts: 2,129
All you have to do is set the AF/MF switch to AF and then your camera will not release the shutter until you get focus confirmation (i.e. the camera "thinks" it is focused).

No need to short out contacts. Also, I usually use AF-S, but I don't think that has a bearing either. Just flip the little switch on the body and you should be good to go.

06-12-2007, 03:49 PM   #24
Senior Member




Join Date: May 2007
Location: Phoenix
Photos: Albums
Posts: 100
Original Poster
QuoteQuote:
alu folie trick is worth a try
Yes, tonight I will.
06-12-2007, 08:18 PM   #25
Senior Member




Join Date: May 2007
Location: Phoenix
Photos: Albums
Posts: 100
Original Poster
Aluminum foil did the trick! It appears the black pain on the bottom side of the lens is preventing the shorting (or whatever) of the contact points.

Anyone see any reason that I couldn't lightly sand the paint off the lens, so it makes contact? Kinda cheesy to have aluminum foil hanging out of a DSLR.

I will also set up the camera on tripod to see if its the focus problem or a user problem. Probably user.

Thanks for all the tips!
06-13-2007, 02:30 PM   #26
Senior Member




Join Date: May 2007
Location: Phoenix
Photos: Albums
Posts: 100
Original Poster
Focusing Problem Solved!

Thanks to all who gave tips, etc. on how to get "focus trap" working on my old SMC 1.9 85 MM.

I found another solution today:
Attached Images
 
06-13-2007, 04:48 PM   #27
Veteran Member




Join Date: Sep 2006
Location: Göteborg, Sweden
Posts: 810
QuoteOriginally posted by varnco Quote
Thanks to all who gave tips, etc. on how to get "focus trap" working on my old SMC 1.9 85 MM.

I found another solution today:
Ok, good you got it working finally. The only reason not to shave off some black color from the lens flange has to do with the reselling value of the lens.

Lol - Buying an FA77 is another way of course... Not very cheapo and it doesn't do any focus trap easily.
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!
camera, focus, k-mount, lens, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Focus, Focus, Focus (or the usefulness of focus charts) GoremanX Pentax DSLR Discussion 31 12-21-2014 11:49 AM
Never Take an Out-of-Focus Picture Again: Adobe’s New Plenoptic Lens Tech yusuf Photographic Technique 20 10-11-2010 03:42 AM
digital picture slabs used to help focus your camera Gooshin General Talk 1 10-29-2008 12:13 PM
Are people required to be in a picture to make it a good picture? BPT Photographic Technique 46 07-07-2008 05:44 PM
my world picture day picture little laker Post Your Photos! 8 04-09-2007 07:57 AM



All times are GMT -7. The time now is 04:18 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