Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
05-05-2019, 07:38 PM - 17 Likes   #31081
Site Supporter
Site Supporter
luftfluss's Avatar

Join Date: Jun 2011
Location: NJ
Photos: Gallery | Albums
Posts: 5,502
QuoteOriginally posted by normhead Quote
I got a bit of a surprise today. I was shooting with the K-1 and Tamron 300 with Tamron 2x TC for 600mm 5/6.

Eventually I started shooting with the K-3 and the Tamron 300 and 2x, just to check the image quality, I'm not sure with the 2x on the K-3 I've been getting some pretty spotty results.


Not terrible but also, I have better, shot with the Pentax 1.7x.
I looked at that junco on your Flickr, and it looks to me like there was camera shake.

But yeah, I find the Pentax 1.7x is sharper than even a really good 2x TC. With all the coolness that is the AF capability of the 1.7x, I think sometimes people forget that it is actually very good optically for a 1.7x TC.

This is with the K-3 II + Tamron 300/2.8 (360B) + 1.7x AFA, cropped away 75% of the frame. Lens was @ f/5.6.




And this is the K-3 II + Tamron 300/2.8 (360B) + A 2x-S, cropped away about 2/3 of the frame. Lens was @ f/5.6



05-06-2019, 06:00 AM   #31082
Site Supporter
Site Supporter




Join Date: Nov 2012
Location: North Wales
Photos: Gallery | Albums
Posts: 1,995
Fine pics once again luftluss. I 've looked hard at a number of the 1.7x's that have floated by on ebay but have so far been reluctant to bid the 160-180-odd that might win one. Might just have to bite the bullet...
05-06-2019, 06:06 AM   #31083
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 33,056
QuoteOriginally posted by luftfluss Quote
I looked at that junco on your Flickr, and it looks to me like there was camera shake.
One of the problems with that TC is it doesn't correctly tell the camera the correct focal length, so if you do move the camera, SR doesn't compensate. NO doubt some year, Pentax will come out with a 2x TC for us.
05-06-2019, 06:44 AM   #31084
Loyal Site Supporter
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 10,854
QuoteOriginally posted by marcusBMG Quote
Fine pics once again luftluss. I 've looked hard at a number of the 1.7x's that have floated by on ebay but have so far been reluctant to bid the 160-180-odd that might win one. Might just have to bite the bullet...
I own a 1.7x, and have since the 1980's when I bought an SF-1. It works surprisingly well on my M 400/5.6. The problem I have, of course, is that I am working with a 680mm f/9.5. The 680 demands shutter speeds and the 9.5 denies them unless I crank the ISO up.

05-06-2019, 06:59 AM   #31085
Site Supporter
Site Supporter
luftfluss's Avatar

Join Date: Jun 2011
Location: NJ
Photos: Gallery | Albums
Posts: 5,502
QuoteOriginally posted by marcusBMG Quote
Fine pics once again luftluss. I 've looked hard at a number of the 1.7x's that have floated by on ebay but have so far been reluctant to bid the 160-180-odd that might win one. Might just have to bite the bullet...
Thanks!


QuoteOriginally posted by Canada_Rockies Quote
I own a 1.7x, and have since the 1980's when I bought an SF-1. It works surprisingly well on my M 400/5.6. The problem I have, of course, is that I am working with a 680mm f/9.5. The 680 demands shutter speeds and the 9.5 denies them unless I crank the ISO up.
That's interesting. I have the A 400/5.6 and I haven't been able to get successful AF when mated to the 1.7x. I'm envious of your success!
05-06-2019, 07:03 AM   #31086
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 33,056
QuoteOriginally posted by luftfluss Quote
Thanks!




That's interesting. I have the A 400/5.6 and I haven't been able to get successful AF when mated to the 1.7x. I'm envious of your success!
I had terrible success with that combo. I ended up using manual focus judging focus by my old film MF method. Focus until it's sharp, go back until it looks soft, go forward until it's sharp focus again, go forward until it's soft, estimate the middle of the two soft point, set and shoot. AF was a sure miss with that combo.

Last edited by normhead; 05-06-2019 at 07:11 AM.
05-06-2019, 07:03 AM   #31087
Site Supporter
Site Supporter
luftfluss's Avatar

Join Date: Jun 2011
Location: NJ
Photos: Gallery | Albums
Posts: 5,502
QuoteOriginally posted by normhead Quote
One of the problems with that TC is it doesn't correctly tell the camera the correct focal length, so if you do move the camera, SR doesn't compensate. NO doubt some year, Pentax will come out with a 2x TC for us.
I think I forgot when I posted that your 300/2.8 + 2x TC combo is AF. Since my 300/2.8 is MF, I get to input the appropriate focal length for SR. It's a shame we aren't allowed to manually override the focal length for AF lenses.
05-06-2019, 07:39 AM   #31088
Loyal Site Supporter
Loyal Site Supporter
Canada_Rockies's Avatar

Join Date: Nov 2007
Location: Sparwood, BC, Canada
Photos: Gallery | Albums
Posts: 10,854
QuoteOriginally posted by luftfluss Quote
That's interesting. I have the A 400/5.6 and I haven't been able to get successful AF when mated to the 1.7x. I'm envious of your success!
I rarely even try the AF capabilities of the 1.7x with the M 400/5.6. My K-3 is set to use back button AF, so it doesn't even try. Having started using Pentax with an original first edition, AF is still an anomaly to me. The 1.7x AFA mates very well optically with the M 400.

05-06-2019, 08:11 AM   #31089
Site Supporter
Site Supporter
luftfluss's Avatar

Join Date: Jun 2011
Location: NJ
Photos: Gallery | Albums
Posts: 5,502
QuoteOriginally posted by Canada_Rockies Quote
I rarely even try the AF capabilities of the 1.7x with the M 400/5.6. My K-3 is set to use back button AF, so it doesn't even try. Having started using Pentax with an original first edition, AF is still an anomaly to me. The 1.7x AFA mates very well optically with the M 400.
Gotcha.
05-06-2019, 10:31 AM - 9 Likes   #31090
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 33,056
Enough of the trying to get a K-1 to do what a K-3 does... back to what works. My life just got so much easier.
K-3
Tamron 300 2.8 with HD DA 1.4 TC. (420 mm 4 [630mm FF equivalent])
ISO 200 8, AV mode
Dark eyed Junco


Hairy Woodpecker


Female purple finche.




Male Purple finch


Blue Jay


White Throated Sparrow


Red Breasted Nuthatch
05-06-2019, 01:31 PM - 1 Like   #31091
Site Supporter
Site Supporter
swip's Avatar

Join Date: Sep 2011
Location: Ottawa, Ontario
Photos: Gallery
Posts: 1,234
QuoteOriginally posted by normhead Quote
Enough of the trying to get a K-1 to do what a K-3 does... back to what works. My life just got so much easier.
K-3
Tamron 300 2.8 with HD DA 1.4 TC. (420 mm 4 [630mm FF equivalent])
A nice mix. What were you trying to get the K-1 to do?

---------- Post added 05-06-19 at 04:35 PM ----------

QuoteOriginally posted by luftfluss Quote

This is with the K-3 II + Tamron 300/2.8 (360B) + 1.7x AFA, cropped away 75% of the frame. Lens was @ f/5.6.
Excellent shot of the hawk.

---------- Post added 05-06-19 at 04:37 PM ----------

QuoteOriginally posted by r0ckstarr Quote
K3 + 150-450mm
Lots of nest building going on. Great shots.
05-06-2019, 01:46 PM   #31092
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 33,056
QuoteOriginally posted by swip Quote
A nice mix. What were you trying to get the K-1 to do?.
The little birds move very quickly, out of a burst of 10 it's rare I get more than one or two with the pose I want, and often the pose that I pulled the trigger for has changed before my shutter actuates. So bottom line, the K-3 at 8 fps runs for 3 seconds. The K-1 at 4.6 fps for 1.5. The chances of pulling an image from a burst is cut in half. Meaning you probably want to shoot twice as long. It just seems really slow. Pretty much the same number of keepers, with quite a few less birds to choose from in half the time.

Last edited by normhead; 05-06-2019 at 06:05 PM.
05-06-2019, 02:08 PM - 2 Likes   #31093
Pentaxian




Join Date: Feb 2010
Photos: Albums
Posts: 1,854
DFA*300 & K3

Keith Barker who plays county cricket (the top professional clubs) turns out for his local amateur side Enfield and as expected knocks over stumps





and the wicket keeper and slip fielder celebrate

05-06-2019, 03:10 PM - 25 Likes   #31094
Site Supporter
Site Supporter




Join Date: Jun 2018
Posts: 220








05-06-2019, 03:30 PM - 14 Likes   #31095
Site Supporter
Site Supporter
chickentender's Avatar

Join Date: Jan 2008
Location: Olympia, WA
Photos: Gallery | Albums
Posts: 2,843
A snap from our crazy cold-spell a couple months back. Our two resident Anna's stayed close to the house and this one enjoyed the sun, what little warmth it gave, between heated feeder trips on this particular morning. K-3 | DA*300


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!
300mm, 300mm plus lens, 560mm, beach, birds, canada, chickadee, club, coast, couple, dogs, feb, flickr, friend, gulf, half, lens club, lenses, love, moon, pentax lens, pm, post, scene, sea, series, shore, shot, sigma, sunset, wife
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
The Sigma Lens Club- All lenses Blue Lens Clubs 2316 3 Days Ago 07:29 PM
Soviet lenses club Voe Lens Clubs 3760 07-13-2019 03:53 PM
Wanted - Acquired: Long lens >300mm in K-mount pop4 Sold Items 1 10-03-2010 03:03 AM
Pentax DA 55-300mm vs Tamron 70-300mm at long end (brickwall) tcdk Pentax SLR Lens Discussion 17 11-15-2009 12:52 AM



All times are GMT -7. The time now is 04:35 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