Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
01-30-2011, 05:14 PM   #1
Forum Member
Rusty Rat's Avatar

Join Date: Mar 2009
Location: Southern Ontario
Photos: Albums
Posts: 71
60-250mm opinions

Been doing more with moving subjects lately using the longer end of my telephoto lens (all camera motor driven AF) and I can't say I'm real happy with the AF hunting. Out of 250 shots recently, maybe 20-30 were acceptable. Manual focus with them isn't an option thanks to skinny focus rings that don't work well with gloves and other issues. My MF lenses have been hamstrung by the wonky meter produced by my change of focusing screens on my K20.

All that to say I need a better (as in faster, more positive AF) longer telephoto zoom option.

Will the 60-250 do the job or should I look elsewhere?

Here's a sample of what I'm trying to do . . . shot with the WR 50-200

Attached Images
View Picture EXIF
PENTAX K10D  Photo 

Last edited by Rusty Rat; 01-30-2011 at 05:23 PM.
01-30-2011, 05:33 PM   #2
Site Supporter




Join Date: Oct 2009
Location: Philadelphia, Pa
Photos: Gallery
Posts: 764
I understand your pain. My 55-300mm hunted like a dog with my K20. I have recently acquired a K5 and have not used that lens with it yet. I will say that all lenses are capable of hunting. Have you tried the center point focus? I use it exclusively for wildlife unless I am trying to get BIF pictures, then I use Multi point focus. I also use F8 almost exclusively with the Bigma as it gets a little soft wide open. Your picture actually looks pretty good on my monitor. If you are interested in birds, I would suggest trying to find something like a Sigma 50-500mm or even the DA*300mm with a teleconverter. I own both and they are very capable lenses. You do need a monopod or tripod with them though.
01-30-2011, 07:01 PM   #3
Forum Member
Rusty Rat's Avatar

Join Date: Mar 2009
Location: Southern Ontario
Photos: Albums
Posts: 71
Original Poster
Gary, you're right in that I should be using the centre point focus more than I do. I'm getting too ambitious in trying to get focus, composition, and focal length all correct with a subject that stays still for just a second or so. Better to just put the pipper on the bird's head and worry about the rest when I get home.

I'll look into the Sigma as well. Thanks
01-31-2011, 10:28 AM   #4
Forum Member
Rusty Rat's Avatar

Join Date: Mar 2009
Location: Southern Ontario
Photos: Albums
Posts: 71
Original Poster
Gary

With the Sigma OS, do we shut off the in-camera shake reduction?

I'm looking at either the 120-400 or the 50-500. The former has the edge for me being cheaper, smaller, lighter, 77mm filter (which I already have) and a tad quicker.

01-31-2011, 11:27 AM   #5
Site Supporter
SpecialK's Avatar

Join Date: Dec 2006
Location: So California
Photos: Gallery
Posts: 14,853
QuoteOriginally posted by Rusty Rat Quote
With the Sigma OS, do we shut off the in-camera shake reduction?
Yes, we do. I prefer using the SR, however, for a few minor reasons.
01-31-2011, 01:22 PM   #6
Site Supporter




Join Date: Oct 2009
Location: Philadelphia, Pa
Photos: Gallery
Posts: 764
You have to use only in lens or in camera. Not both at the same time.
02-06-2011, 12:31 PM - 1 Like   #7
Veteran Member




Join Date: Aug 2007
Photos: Gallery
Posts: 1,563
Hi,

I once did this test with my K-7.
I'll need to redo this with my K-5.
Hope it helps.

Cheers, Bert

YouTube - Pentax K-7 focus speed: DA* 60-250mm versus DA 55-300mm
02-06-2011, 01:10 PM   #8
Moderator
Tom S.'s Avatar

Join Date: May 2008
Location: S.E. Michigan
Photos: Albums
Posts: 4,239
QuoteOriginally posted by bymy141 Quote
Hi,

I once did this test with my K-7.
I'll need to redo this with my K-5.
Hope it helps.

Cheers, Bert

YouTube - Pentax K-7 focus speed: DA* 60-250mm versus DA 55-300mm
Bert, that was interesting and I'll be looking forward to see how the K5 does.

02-06-2011, 02:22 PM   #9
Veteran Member




Join Date: Aug 2007
Photos: Gallery
Posts: 1,563
QuoteOriginally posted by Tom S. Quote
Bert, that was interesting and I'll be looking forward to see how the K5 does.
The interesting thing here is that my DA* 16-50 focuses so much faster than the DA 60-250mm. Not because of the camera, but because of the lens.

The 55-300mm vs the 60-250mm is more or less the same on the lens focus speed, however the K-7 does a lot less focus hunting with the 60-250mm than with the 55-300mm.

- Bert
02-06-2011, 03:53 PM   #10
Ole
Administrator
Ole's Avatar

Join Date: Sep 2006
Location: Copenhagen, Denmark
Photos: Gallery | Albums
Posts: 3,872
I found the 60-250 extremely accurate in focusing with my K-7 and K-5 with no hunting (until the SDM motor died, that is). Perhaps not as fast in auto-focus as an FA* lens, but quite respectable.

I now obviously use it in manual focus mode only but the image quality is top notch so I'm considering getting the SDM motor fixed.
02-07-2011, 08:21 AM   #11
Moderator
Tom S.'s Avatar

Join Date: May 2008
Location: S.E. Michigan
Photos: Albums
Posts: 4,239
QuoteOriginally posted by bymy141 Quote
The interesting thing here is that my DA* 16-50 focuses so much faster than the DA 60-250mm. Not because of the camera, but because of the lens.

The 55-300mm vs the 60-250mm is more or less the same on the lens focus speed, however the K-7 does a lot less focus hunting with the 60-250mm than with the 55-300mm.

- Bert
Could it be because the 16-50 lets more light in enabling quicker focus? Unless you manually stop both lenses to the same F setting (and keep it there during focusing), the 16-50 will always get more light to the sensor.
02-07-2011, 09:13 AM   #12
Veteran Member
alexeyga's Avatar

Join Date: Dec 2008
Location: Montreal, Canada
Posts: 838
QuoteOriginally posted by Ole Quote
I found the 60-250 extremely accurate in focusing with my K-7 and K-5 with no hunting (until the SDM motor died, that is). Perhaps not as fast in auto-focus as an FA* lens, but quite respectable.

I now obviously use it in manual focus mode only but the image quality is top notch so I'm considering getting the SDM motor fixed.
First time I'm hearing about SDM failure on the 60-250.... sad thing that is...
02-07-2011, 02:52 PM   #13
Ole
Administrator
Ole's Avatar

Join Date: Sep 2006
Location: Copenhagen, Denmark
Photos: Gallery | Albums
Posts: 3,872
Yes, I had thought/hoped that the 60-250 was a newer and better generation of SDM.
02-07-2011, 02:55 PM   #14
Senior Member
Loren E's Avatar

Join Date: Oct 2010
Location: Washington and California
Posts: 274
I was hoping so too because I have one arriving thursday.....
02-07-2011, 06:05 PM   #15
JHD
Veteran Member




Join Date: Jan 2010
Photos: Albums
Posts: 1,407
The truth is there is no new or better generation of SDM.
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!
af, focus, k-mount, option, pentax lens, slr lens, telephoto
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
Which Zoom Lens? "Tamron AF 18-250mm", "Pentax-DA 18-250mm" or "Sigma 18-250mm" hoomanshb Pentax SLR Lens Discussion 4 07-30-2010 09:50 AM
PENTAX 18-250mm VS QUANTARAY 70-300mm@250mm charliezap Pentax SLR Lens Discussion 7 02-08-2010 11:38 PM



All times are GMT -7. The time now is 11:22 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