Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-23-2011, 06:57 PM   #16
Inactive Account




Join Date: Aug 2008
Location: Michigan, USA
Photos: Gallery | Albums
Posts: 7,485
QuoteOriginally posted by jstevewhite Quote
I keep thinking about the 300 f4. Makes a 510 ~f5.8, yes?

Then I see the old Tamron SP 300mm f2.8 on eekbay for $500 and go hrm... (I have the SP 2x and the SP 1.4x, along with the SP 180mm f2.5). I used to rent that lens and got some stunning images with it...
Something like that. I would love to have the 180. I wanted a 300 f2.8 until I watched a FA*300 f2.8 blow right past any comfort zone of mine to $3500 (and that may have been cheap, I don't know).



05-23-2011, 10:44 PM   #17
Veteran Member




Join Date: Apr 2011
Location: Texas
Photos: Gallery | Albums
Posts: 528
Original Poster
Well I said "the best" because I figured any teleconverter would be under $100 lol.. Used to seeing them for like $30.

So which is the best one under $100? lol..
05-23-2011, 10:49 PM   #18
Veteran Member




Join Date: Mar 2009
Location: Midwest
Photos: Gallery
Posts: 1,407
QuoteOriginally posted by geekette Quote
Well I said "the best" because I figured any teleconverter would be under $100 lol.. Used to seeing them for like $30.

So which is the best one under $100? lol..
Well, that's a crapshoot. Rule of thumb goes 7 element 2x==good, 4 element 2x==bad.

I'd check ebay for one of the Tamron SP 2x; they weren't too bad. There are some Vivitar series one Macro Teleconverters that are pretty decent (but only sell for less than $100 occasionally). Or, go to your local used camera store and ask to see their TC junk bin, then go through the K mount ones until you find one that doesn't suck

It's worth noting that it can depend on the lens that's attached. I had an old Kenko POS for my Canon that was absolutely stellar with my 200mm f2.8, but was really terrible with anything else. And a Vivitar S1 Macro TC that was excellent with my Tamron 90, but terrible for long telephotos.

In other words, once you get outside the ones mentioned, you're just guessing. Most, though, will be crap.
05-23-2011, 10:57 PM   #19
Veteran Member
selar's Avatar

Join Date: Jul 2007
Location: Sydney, Australia
Photos: Gallery | Albums
Posts: 2,035
I have a Kenko 1.5x SHQ convertor thats very good, you can get that for a bit over $100, has the advantage of working with SDM as well. However, it doesnt modify the aperture, so you may have to use exposure compensation.

05-23-2011, 11:03 PM   #20
Pentaxian
Marc Sabatella's Avatar

Join Date: Sep 2006
Location: Denver, CO
Photos: Gallery
Posts: 10,686
QuoteOriginally posted by geekette Quote
Well I said "the best" because I figured any teleconverter would be under $100 lol.. Used to seeing them for like $30.

So which is the best one under $100? lol..
See my previous post; it's just that much more true now.

But if you really are just interesting in using it as a telescope and not taking pictures, then any TC will do fine - the viewfinder image isn't big enough to show much image degradation. Or get one of the "telescope" type lenses, which also aren't that good, but not so bad you'd necessarily be able to tell just looking through the viewfinder.
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!
k-mount, optics, pentax lens, slr lens
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Teleconverter Mount chromo Pentax SLR Lens Discussion 8 08-30-2010 05:22 PM
Teleplus MC4 2X Teleconverter for Pentax Mount tom_kkh Pentax SLR Lens Discussion 5 03-13-2010 08:59 PM
k mount teleconverter mag123 Troubleshooting and Beginner Help 10 03-05-2010 09:56 PM
Adaptall teleconverter (mount) question... cheekygeek Pentax SLR Lens Discussion 4 02-22-2010 12:05 PM



All times are GMT -7. The time now is 07:15 PM. | See also: NikonForums.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