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05-12-2015, 07:40 PM   #886
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QuoteOriginally posted by Stavri Quote
The d-Fa image look slightly punchier on my calibrated screen
It's not just the colour rendition, the D-FA seems considerably sharper.

05-13-2015, 02:53 AM   #887
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QuoteOriginally posted by GlassJunkie Quote
Dragged out the new DFA 150-450, began test. 450mm (jpg), outdoor light 15ft. Then a comp with FA* 300 F2.8 and HD 1.4x TC (eff 420)... Something told me that 450MM would be a bit larger than 420... Here are actuals (resized w/o crop) for your input....You may not see it here but in the origs the mag on the eff 420mm (300 and 1.4x) is greater than the 450mm DFA
That is due to focus breathing, not? My 55-300 has quite a bit, so that it is really only 300mm when focused at inifinity and probably more like 220mm when focused at its closest point. I think primes tend to do it less than zooms.
05-13-2015, 04:12 AM   #888
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QuoteOriginally posted by Canada_Rockies Quote
Stranger things have happened with internal focus and zoom lenses.
The 150-450mm lens has internal focus but not internal zoom. It extends by just over 2.5 inches from 150mm to 450mm.

The 70-200mm lens has internal both.
05-13-2015, 04:23 AM   #889
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QuoteOriginally posted by Rondec Quote
That is due to focus breathing, not? My 55-300 has quite a bit, so that it is really only 300mm when focused at inifinity and probably more like 220mm when focused at its closest point. I think primes tend to do it less than zooms.
Indeed. This completely normal.

05-13-2015, 05:02 AM   #890
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My DA* 60-250 is about the same as my DA 18-135 at 135mm at 12 feet or less. The really sad thing about that, is if you buy the lens for shooting small birds etc. close up, my A-400 will probably blow it's socks off for magnification.
05-13-2015, 06:12 AM   #891
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QuoteOriginally posted by Stavri Quote
With all due respect the Bigma just.....
On a dark rainy morning a Bigma 50-500 @ ISO 6400, wide open 6.7, 1/160 Handheld, ISO 6400, shot through a double pane window.......With all DUE Respect, for over twice the price of the Bigma the Pentax 150-450....

JUST WON'T CUT IT!




There is "Brand Loyalty" and there is common sense with cash. I have plenty of cash...do you?

Regards!
05-13-2015, 06:20 AM   #892
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Norm... My 60-250 VS 150-450@250

QuoteOriginally posted by normhead Quote
My DA* 60-250 is about the same as my DA 18-135 at 135mm at 12 feet or less. The really sad thing about that, is if you buy the lens for shooting small birds etc. close up, my A-400 will probably blow it's socks off for magnification.
In my 100 frame analysis, here is a 250mm matchup with our favorite lens... 60-250 Then the 150-450, same distance...

---------- Post added 05-13-15 at 09:23 AM ----------

QuoteOriginally posted by Stavri Quote
Interesting comparision, The d-Fa image look slightly punchier on my calibrated screen, the IQ is too close to to call. I'd love to see some 100% center and corner crops when you find the time si vous plait...
TC probably has some impact. Will do a 300/300mm coming. I tested 7 lenses at a bunch of intersections vs the 150-450. Still processing resizes...
Attached Images
View Picture EXIF
PENTAX K-3  Photo 
View Picture EXIF
PENTAX K-3  Photo 
05-13-2015, 06:25 AM   #893
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QuoteOriginally posted by Rupert Quote
On a dark rainy morning a Bigma 50-500 @ ISO 6400, wide open 6.7, 1/160 Handheld, ISO 6400, shot through a double pane window.......With all DUE Respect, for over twice the price of the Bigma the Pentax 150-450....

JUST WON'T CUT IT!




There is "Brand Loyalty" and there is common sense with cash. I have plenty of cash...do you?

Regards!
Some people have even more cash.

05-13-2015, 06:33 AM - 1 Like   #894
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SmallerBigma 120-400 VS 300 F4, f2.8, 150-450

QuoteOriginally posted by Rupert Quote
On a dark rainy morning a Bigma 50-500 @ ISO 6400, wide open 6.7, 1/160 Handheld, ISO 6400, shot through a double pane window.......With all DUE Respect, for over twice the price of the Bigma the Pentax 150-450....

JUST WON'T CUT IT!
Same drill... 300mm variants... Bigma, 150-450, 300F4, 300 F2.8... All same place, tripod... More variability than expected...
Attached Images
View Picture EXIF
PENTAX K-3  Photo 
View Picture EXIF
PENTAX K-3  Photo 
View Picture EXIF
PENTAX K-3  Photo 
View Picture EXIF
PENTAX K-3  Photo 
05-13-2015, 06:39 AM   #895
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QuoteOriginally posted by GlassJunkie Quote
Same drill... 300mm variants... Bigma, 150-450, 300F4, 300 F2.8... All same place, tripod... More variability than expected...
Why f/10 with the 150-450?
05-13-2015, 06:41 AM   #896
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QuoteOriginally posted by JinDesu Quote
Some people have even more cash.
Without some common sense they won't have it for long!

Another rainy morning Bigma @ 500mm....wide open at 6.7...Handheld through double pane glass @1/50....ISO 2000. Cropped 50%.


Enough cash left over for a weekend cruise in the Caribbean!

Regards!
05-13-2015, 06:45 AM - 1 Like   #897
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And a 'Shorty" Sample... 135-150mm test... for DFA150-450 vs others...

OK. A real IQ... test 50-135, Sig 120-400, 60-250, and 150-450 at 150mm... Exif on 150-450 says 310mm... image is 150mm. I turned it back to "lock" zoom ring, Dunno...
Attached Images
View Picture EXIF
PENTAX K-3  Photo 
View Picture EXIF
PENTAX K-3  Photo 
View Picture EXIF
PENTAX K-3  Photo 
View Picture EXIF
PENTAX K-3  Photo 
05-13-2015, 06:56 AM   #898
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QuoteOriginally posted by GlassJunkie Quote
Same drill... 300mm variants... Bigma, 150-450, 300F4, 300 F2.8... All same place, tripod... More variability than expected...
why is exif on 1st pic for SIgma 70-200??
05-13-2015, 06:59 AM   #899
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QuoteOriginally posted by Rupert Quote
On a dark rainy morning a Bigma 50-500 @ ISO 6400, wide open 6.7, 1/160 Handheld, ISO 6400, shot through a double pane window.......With all DUE Respect, for over twice the price of the Bigma the Pentax 150-450....

JUST WON'T CUT IT!




There is "Brand Loyalty" and there is common sense with cash. I have plenty of cash...do you?

Regards!
With respect, Jim, there are folks who have a use for the lens and those who don't. For shooting squirrels and birds at bird feeders, you may not see much improvement, but it does seem that there is some image quality boost for the 150-450 over the Bigma. It is great that you are satisfied with the Bigma, but not everyone is.

Quantifying what a boost in image quality is worth is hard. A DA 35 f2.4 is a cheap lens which can be had for 150-ish, a Sigma 30 f1.4 for 400-ish, and an FA 31 is 1000-ish. I ended up trying each one of these and ended up with the FA 31. The improvement in image quality and rendering of out of focus areas was enough better that I don't regret going with the more expensive lens, but each photographer has to make their own decision about these things.
05-13-2015, 07:02 AM   #900
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I Hate EXIF issues... :)

QuoteOriginally posted by Shanti Quote
why is exif on 1st pic for SIgma 70-200??
EXIF code passed through K-3 processor to give match in Lightroom is "8 13". Sigma didn't pay attention to what codes they reused in 2013. Chip should send"8 16" for camera to generate right EXIF data seen in LR. Sux... No EXIF for 150-450 DFA in LR yet. In LR ver. 5.7 shows as unknown...

---------- Post added 05-13-15 at 10:05 AM ----------

QuoteOriginally posted by gazonk Quote
Why f/10 with the 150-450?
Don't know why, set camera same for all (program). Same filters too... All CPL B+W Nano KSM, except 60-250 is Bresson Top Nano coated.... Same quality....
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