Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
03-28-2009, 12:01 PM   #1
Forum Member
D0ri's Avatar

Join Date: Oct 2008
Photos: Gallery
Posts: 76
Extension Tube on K200D

Hey guys.
I ordered an Extension Tube from Ebay, it doesn't allow auto control on the lens, because it's from the cheap kind.

Is there any way to open manually the aperture to max?
I got the kit lens- DA 18-55/3.5-5.5.
so If I go from 18 for example to 55, what happen to the aperture? is it say on 3.5?

thanks,
D0ri

03-28-2009, 12:52 PM   #2
Senior Member
sajah's Avatar

Join Date: Mar 2009
Location: South Korea
Photos: Gallery
Posts: 275
AFAIK, if you want to use manual extension tube, you need to use older lenses with aperture ring, so you can control the aperture from the lens instead. There are many options with Pentax, such as Pentax A, Pentax M and Pentax K and M42 screw mount lenses, they're all have aperture ring.

I recommend buying Pentax M 1.7, you can get around $50 or less, and use it with the manual extension tube.

Or, you could try to find cheap 2x teleconverter which supports A (auto-aperture), im my experience they're a lot cheaper then A-enabled extension tube (I got one for 30dollar but I'm sure you can get for less). The optical quality doesnt matter because you'll remove the glasses and use it as an extension tube (it's actually very easy to remove them, at least on mine). Because it supports A function you'll be able to set the aperture on K200D and use your 18-55mm lens. But, it will be shorter than normal extension tube I believe, mine is about 2.5cm long (while my manual extension tube is 5cm long) so when you use it with 50mm-55mm lens you only get 1:2 enlargement , not bad for flower shot IMO.

With 18-55mm lens, I think you'd better to keep the zoom at 55mm because if you use shorter focal you'd have to get closer to the subject. In my case, with the 2x teleconverter used as extension tube with 50mm lens, to get in focus, the lens is only 12cm away from the flower / object.
03-28-2009, 02:20 PM   #3
Forum Member
D0ri's Avatar

Join Date: Oct 2008
Photos: Gallery
Posts: 76
Original Poster
well I already bought the tube, and it's manual.
I've got a Nikon lens with manual aperture adjust, can I use it somehow?

A cheap teleconverter is a nice idea, but it will be too short.

I've got an idea - if I set the aperture to max (lets say 5.5) and then take of the lens from the camera, will it work?
03-28-2009, 02:58 PM   #4
Veteran Member
Mike Cash's Avatar

Join Date: Jan 2007
Location: Japan
Photos: Gallery
Posts: 6,952
No, that won't work.

03-28-2009, 03:52 PM   #5
Senior Member
sajah's Avatar

Join Date: Mar 2009
Location: South Korea
Photos: Gallery
Posts: 275
QuoteOriginally posted by D0ri Quote
well I already bought the tube, and it's manual.
I've got a Nikon lens with manual aperture adjust, can I use it somehow?
Yes, if you can manage to mount the Nikon lens to the tube, it'll work. But, I have a Nikon mount lenses too, and while they can mount perfectly fine on my istDS, my manual extension tube refuses to mount them YMMV though

QuoteOriginally posted by D0ri Quote
I've got an idea - if I set the aperture to max (lets say 5.5) and then take of the lens from the camera, will it work?
I think that only work with Canon EOS lens, as a tutorial somewhere on the net explained, but for Pentax lenses they'll revert back to minimum aperture as soon as you remove them from the body, too bad.

Last edited by sajah; 03-28-2009 at 11:38 PM.
03-28-2009, 04:09 PM   #6
Veteran Member
OregonJim's Avatar

Join Date: Mar 2009
Location: Willamette Valley, Oregon
Posts: 1,329
QuoteOriginally posted by D0ri Quote
well I already bought the tube, and it's manual.
I've got a Nikon lens with manual aperture adjust, can I use it somehow?
Yes, if you get a reversing ring. You'll have the additional advantage of a sharper image over mounting it "normally"...
03-29-2009, 05:43 AM   #7
Forum Member
D0ri's Avatar

Join Date: Oct 2008
Photos: Gallery
Posts: 76
Original Poster
the nikon lens is to close for reversing ring, I see black circle around the image.
so what can I do? just take photos with slow shutter speed?
03-29-2009, 07:00 AM   #8
Veteran Member
Mike Cash's Avatar

Join Date: Jan 2007
Location: Japan
Photos: Gallery
Posts: 6,952
QuoteOriginally posted by D0ri Quote
so what can I do?
That was already answered in the first reply you got, one which was very helpful and informative.

When contemplating getting into some new aspect of photography requiring gear one is not familiar with, it is best to ask questions before buying stuff.

03-29-2009, 08:05 AM   #9
Forum Member
D0ri's Avatar

Join Date: Oct 2008
Photos: Gallery
Posts: 76
Original Poster
hmm yes you're absolutely right.
But my last question was what can I do with the current situation, with this tube and this lens, is there any tips or whatsoever...
03-29-2009, 10:41 PM   #10
Pentaxian




Join Date: Feb 2009
Location: Alameda, CA
Posts: 3,205
QuoteOriginally posted by D0ri Quote
well I already bought the tube, and it's manual.
I've got a Nikon lens with manual aperture adjust, can I use it somehow?
It doesn't hurt to try. My favorite portrait lens is an old non-AI Nikkor. It's attached to my K10D. It likely can attach to an extension tube:

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!
aperture, extension, extension tube, lens, tripod, tube
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Extension tube + DA*200 SylBer Pentax SLR Lens Discussion 4 09-10-2009 07:59 AM
Extension Tube Question eccs19 Pentax Camera and Field Accessories 3 01-29-2009 03:28 PM
auto extension tube hll Pentax Camera and Field Accessories 14 12-20-2008 10:05 AM
Few more with extension tube Stratman Post Your Photos! 0 06-06-2007 04:13 PM
First try with extension tube Stratman Post Your Photos! 7 06-04-2007 08:15 PM



All times are GMT -7. The time now is 05:17 PM. | 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