Forgot Password
Pentax Camera Forums Home
 

Reply
Show Printable Version Search this Thread
02-27-2018, 09:18 PM - 1 Like   #1
Site Supporter
Site Supporter




Join Date: Mar 2010
Photos: Albums
Posts: 170
photo comparison between 150-450mm DFA versus 60-250mm DA with a AFA 1.7x tc

I know I probably made a bunch of mistakes on how to go about this test but, if you were curious about how the 60-250mm DA with a AFA 1.7x tc performs versus a 150-450mm DFA then here it is. max focal lengths used, SR was off, tripod was used, if it got more blurry as I stopped down its b/c of my shutter speed (even I can mess up shooting on tripod lol). conversion from raw to jpg via lightroom. attempted 1:1 crop based on 1:1 view on lightroom (who knows if I did it right, but it looks like how it looked 1:1 in lightroom, i just used adjustment mask to help me crop 1:1 as lightroom saw it)

Moon DFA 150-450mm almost 100% crop, with exposure bump 0.40 f8 1/750 iso200
Attachment 388749

Moon DA 60-250mm with AFA 1.7x exposure bump 1.00 f8 1/640 iso200
Attachment 388750

Original Scenes 60-250 w/ AFA 1.7x
Attachment 388752Attachment 388753



60-250 w/ AFA 1.7x stove exhaust f6.7 1/125 iso1600
Attachment 388754

150-450 f5.6 1/180 iso1600
Attachment 388758


150-450 f6.7 1/125 iso1600
Attachment 388759


60-250 w/ AFA 1.7x f8 1/125 iso1600
Attachment 388755

150-450 f8 1/90 iso1600
Attachment 388760


60-250 w/ AFA 1.7x f10 1/80 iso1600
Attachment 388756

150-450 f11 1/125 iso3200
Attachment 388761

60-250 w/ AFA 1.7x f13 1/200 iso 6400
Attachment 388757

150-450 f13 1/60 iso3200
Attachment 388762


Last edited by angelo9978; 04-16-2018 at 06:50 PM.
02-27-2018, 09:26 PM   #2
Site Supporter
Site Supporter




Join Date: Mar 2010
Photos: Albums
Posts: 170
Original Poster
more samples

150-450 booey f5.6 1/50 iso 3200 100% crop
Attachment 388765

60-250 w/ AFA 1.7x f6.7 1/400 iso 3200 100% crop
Attachment 388769
150-450 f6.7 1/350 iso3200 100% crop
Attachment 388766

60-250 w/ AFA 1.7x f8 1/250 iso 3200 100% crop
Attachment 388770

150-450 booey f8 1/250 iso 3200 100% crop
Attachment 388767

60-250 w/ AFA 1.7x f10 1/200 iso 3200 100% crop
Attachment 388771

150-450 f11 1/125 iso3200 100% crop
Attachment 388768

60-250 w/ AFA 1.7x f11 1/125 iso 3200 100% crop
Attachment 388772

Last edited by angelo9978; 04-16-2018 at 06:50 PM.
02-27-2018, 09:54 PM   #3
Site Supporter
Site Supporter
sergysergy's Avatar

Join Date: Jan 2011
Posts: 3,638
while the quality of the 60-250 and the TC is not bad the 150-450 is very good. Thanks for the comparison

Last edited by sergysergy; 02-28-2018 at 06:50 AM.
02-27-2018, 11:44 PM   #4
Seeker of Knowledge
Loyal Site Supporter
aslyfox's Avatar

Join Date: Aug 2016
Location: Topeka, Kansas
Photos: Gallery | Albums
Posts: 16,805
QuoteOriginally posted by sergysergy Quote
while the quality of the 60-250 and the TC is not bad the 150-500 is very good. Thanks for the comparison
don't you mean the 150- 450?

he isn't using a 150-500

02-28-2018, 01:19 AM   #5
Senior Moderator
Loyal Site Supporter
Loyal Site Supporter
BigMackCam's Avatar

Join Date: Mar 2010
Location: North-East of England
Posts: 14,354
I'm a little surprised by the 60-250... The poor sharpness and contrast in the "CYPRESS" photos must be due to the TC. I use the 60-250 plus HD 1.4x converter frequently, and find both sharpness and contrast to be excellent.

Have you done side-by-side shots of for the 60-250 with and without the TC? Might be interesting...
02-28-2018, 05:27 AM   #6
Loyal Site Supporter
Loyal Site Supporter




Join Date: May 2016
Location: East Coast
Posts: 2,402
Interesting how different the bokeh in the buoy shots is between the two scenarios. In the full size shot with the 60-250, the background becomes distracting for me, and I think I prefer the 150-450 from what I'm seeing here. Looks like we loose a little contrast with the TC, but that would be expected. Over all though, I think the 1.7x looks pretty good. I've been interested in this TC for the K-1. I don't think it's likely, but it would be nice to have a modern FF TC.

Last edited by clickclick; 02-28-2018 at 06:08 AM.
02-28-2018, 06:06 AM   #7
Site Supporter
Site Supporter




Join Date: Mar 2010
Photos: Albums
Posts: 170
Original Poster
added 60-250 by itself cypress shots

I do think there may be user error in indoor shots especially at f4 because my ball head was loose, and I tightened the hex screw before I took my outside shots (hex tool was in my car). so in essence, it was on my tripod but it was somewhat loose so I still had to hold the camera steady while taking the indoor shots, especially to keep the frame uniform throughout.

60-250 by itself @ 250mm 100% crops

60-250 f4 1/250 iso 800
Attachment 388833

60-250 f5 1/250 iso 1600
Attachment 388834

60-250 f7.1 1/250 iso 3200
Attachment 388835

60-250 f8 1/200 iso 3200
Attachment 388836

60-250 f10 1/125 iso 3200
Attachment 388837

60-250 f11 1/100 iso 3200
Attachment 388838

60-250 f13 1/80 iso 3200
Attachment 388839

So far I'm happy with the AFA 1.7x. I will retest my 60-250 again, with and without the AFA 1.7x, just because I will be more careful and mindful of settings on my 2nd test. I did use the AFA 1.7x with my A 50mm F1.2 and was happy with the rendering and results there just from in camera peeping (resulting in 85mm f2.8). I deleted those test photos, but maybe I will retest and post that combination. The AFA 1.7x is spot on in focusing especially when you double check it using live view zoomed in, I finally get why on some lenses you have to get it within focusing range to enable the AFA to focus the rest of the way. My 60-250mm motor died, so all focusing on that without the AFA is manual. The 150-450 definitely appears better at rendering small details, as I would expect regarding its cost; I'm going to shoot with it constantly for the next year partly because I just found the 3 instances of the lens coming apart as reported in this forum and want to make sure if mine does that that it is still under warranty (I do have a later serial number than the reported mishaps). Last, I've never went birding before, but I'm definitely going to start especially now I have this lens, and I hear NJ is good real estate for birding.

Last edited by angelo9978; 04-16-2018 at 06:50 PM.
02-28-2018, 06:11 AM   #8
Loyal Site Supporter
Loyal Site Supporter




Join Date: May 2016
Location: East Coast
Posts: 2,402
QuoteOriginally posted by angelo9978 Quote
Last, I've never went birding before, but I'm definitely going to start especially now I have this lens
I think you'll find the focus speed on the 150-450 gives you an edge over the 60-250 for this.

02-28-2018, 06:54 AM   #9
Senior Moderator
Loyal Site Supporter
Loyal Site Supporter
BigMackCam's Avatar

Join Date: Mar 2010
Location: North-East of England
Posts: 14,354
QuoteOriginally posted by angelo9978 Quote
I do think there may be user error in indoor shots especially at f4 because my ball head was loose, and I tightened the hex screw before I took my outside shots (hex tool was in my car). so in essence, it was on my tripod but it was somewhat loose so I still had to hold the camera steady while taking the indoor shots, especially to keep the frame uniform throughout.
I'm not quite seeing what I would expect from the 60-250 here I'm wondering if you're shooting from a tripod with SR enabled, or if the AF fine adjustment needs calibrating?

I've just taken the below shot using the 60-250 + HD 1.4x converter. These are screen grabs from Lightroom - the first shows the entire frame, the second is at 100% reproduction:





This is with the lens at 250mm and wide open (= 350mm @ f/5.6 with the converter), so you're seeing it at its worst here. No post-processing except for a slight exposure boost and some colour noise reduction. No sharpening etc.

Stop down a little and the sharpness is better still.

Last edited by BigMackCam; 02-28-2018 at 07:04 AM.
02-28-2018, 07:03 AM   #10
Loyal Site Supporter
Loyal Site Supporter




Join Date: May 2016
Location: East Coast
Posts: 2,402
Mike, have you used the 1.4x and 60-250 on a K-1? Wondering about vignetting. I've been toying with grabbing a 1.7x or 1.4x to go with my 150-450 and 60-250, both being used back and forth between a K-3II and K-1.

Thanks

-David
02-28-2018, 07:09 AM   #11
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 33,800
The 60-250 doesn't look as bright, an EV boost in post would be in order.

Apart from that in terms of detail, they appear pretty much identical. I can see no detail on the 150-450 that isn't present on the DA*60-250. All the little scratches, bits of dust etc. are present on both, A good post processor will give you equivalent results with either.

I don't use the 60-250 with the 1.7 because of the difficulty hand focussing Pentax quick shift, and because for the birds I shoot, you can lose images because you never actually lock focus before the bird leaves. And because for longer images I have the 1.7x and Tamron 300 2.8.

But my take looking at your images is it wouldn't be worthile for me to buy the 150-450. There's a small difference, but not a $2000 dollar difference. If was to buy the 150-450 based on this it would be for the speed of AF.

Last edited by normhead; 02-28-2018 at 07:46 AM.
02-28-2018, 07:18 AM   #12
Senior Moderator
Loyal Site Supporter
Loyal Site Supporter
BigMackCam's Avatar

Join Date: Mar 2010
Location: North-East of England
Posts: 14,354
QuoteOriginally posted by clickclick Quote
Mike, have you used the 1.4x and 60-250 on a K-1? Wondering about vignetting. I've been toying with grabbing a 1.7x or 1.4x to go with my 150-450 and 60-250, both being used back and forth between a K-3II and K-1.
I'm afraid I haven't, David, but I understand it vignettes quite badly The sooner Ricoh comes out with a FF TC, the better...
02-28-2018, 07:26 AM   #13
Seeker of Knowledge
Loyal Site Supporter
aslyfox's Avatar

Join Date: Aug 2016
Location: Topeka, Kansas
Photos: Gallery | Albums
Posts: 16,805
DA* 60-250mm F4 ED [IF] SDM: ++ (officially rated "designed for FF" by Pentax patent US7489452) probably good on full frame but evaluation still missing; the rating is +++ with a baffle modification, + without)


Overall rating scale:
+++: no significant difference between APS-C and FF corners
++: difference but usable at full aperture with a small loss in corner IQ only
+: usable staring at f/4~f/5.6, with no or a small loss in corner IQ only
o: usable at f/11 or with big loss in corner IQ only
-: not usable


Read more at: DA lenses on Full Frame: Test Shots thread - Page 34 - PentaxForums.com
02-28-2018, 07:35 AM   #14
Senior Moderator
Loyal Site Supporter
Loyal Site Supporter
BigMackCam's Avatar

Join Date: Mar 2010
Location: North-East of England
Posts: 14,354
QuoteOriginally posted by Aslyfox Quote
DA* 60-250mm F4 ED [IF] SDM: ++ (officially rated "designed for FF" by Pentax patent US7489452) probably good on full frame but evaluation still missing; the rating is +++ with a baffle modification, + without
I may be wrong, Allen, but I think Dave already has the 60-250 and 150-450, and was considering whether the HD 1.4x converter would be suitable. Unfortunately, it's not... I believe it vignettes considerably on FF....
02-28-2018, 07:35 AM   #15
Pentaxian
normhead's Avatar

Join Date: Jun 2007
Location: Near Algonquin Park
Photos: Gallery | Albums
Posts: 33,800
I have no keepers taken on a K-1 with that 1.4 and 60-250. If I tried it, I didn't like the results.

The 60-250 vignettes on the K-1, the HD DA 1.4 vignettes on the K-1. What are the odds? It's a combination I'm sure I would have tried.

Last edited by normhead; 02-28-2018 at 07:45 AM.
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!
1.7x, 150-450mm, 60-250mm, afa, da, dfa, f8, info, iso1600, k-1, k-mount, k3ii, lightroom, pentax lens, slr lens, tc, thanks
Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
DFA 150-450mm versus DA 560mm biz-engineer Pentax SLR Lens Discussion 17 04-19-2018 05:07 PM
Is there a 1.7x TC that will use all functions on the D-FA 150-450mm ED DC AW lens? tduell Pentax SLR Lens Discussion 10 05-26-2016 03:53 PM
Pentax Full-Frame, DFA* 70-200mm, DFA 150-450mm Announced Adam Pentax News and Rumors 544 03-14-2015 05:29 AM
For Sale - Sold: FA*28-70mm, FA*85mm, Lester Dine macro+flash, 1.4x, 1.7x AFA, F/FA/DFA 50 (Wor dgaies Sold Items 22 09-05-2010 09:44 PM
1.4x TC + 55-300 versus 1.7x TC + 55-300 versus 55-300mm + cropping. Pentaxor Pentax SLR Lens Discussion 9 09-05-2009 02:41 PM



All times are GMT -7. The time now is 04:13 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