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02-01-2019, 06:58 PM   #31
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Yet after all that, how do I know DA 150-450 can't do better?

The issue here being, not so good lenses can do pretty good work if the subject is close enough and the subject doesn't tax it's resolution.... it's at distance that the results of abetter lens are readily noticeable. I was satisfied with my Sigma 120-400 from 8 feet away. Test shots from a KM away were atrocious. Even my old Sigma 70 300 gave good results if the subject was close enough.

02-02-2019, 09:40 PM   #32
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QuoteOriginally posted by dagoban Quote
Some examples with my Sigma 50-500 OS HSM and k1:

Sigma 50-500 is not weather sealed:



Pentax 150-450 is sharper on edges and better with chromatic aberrations, but sigma 50-500 is quite sharp closing to F8-F9, bokeh is softer,





It's more versatile:

50 mm:



500 mm:







It has a pseudo macro mode:



And the optical stabilizer is better than the k1 stabilizer:



The final decision on the lens depends on the user (more photos: Probando el Sigma 50-500 OS HSM | Flickr ).































I have the Non OS version. I've heard the OS version is better than the Non OS version.

I agree the Bigma has more versatility/range which is why I'm not planning on getting rid of mine. But the Pentax is just such a good lens, plus the WR is a big plus even though we don't get much weather here in So. Cal.
02-03-2019, 07:19 AM   #33
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QuoteOriginally posted by normhead Quote
Yet after all that, how do I know DA 150-450 can't do better?

The issue here being, not so good lenses can do pretty good work if the subject is close enough and the subject doesn't tax it's resolution.... it's at distance that the results of abetter lens are readily noticeable. I was satisfied with my Sigma 120-400 from 8 feet away. Test shots from a KM away were atrocious. Even my old Sigma 70 300 gave good results if the subject was close enough.
For much of the year where I live, there’s so much moisture in the air that photos a km away will be a smeary mess regardless of the lens... I hate that...

-Eric
02-03-2019, 08:46 AM   #34
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QuoteOriginally posted by TwoUptons Quote
For much of the year where I live, there’s so much moisture in the air that photos a km away will be a smeary mess regardless of the lens... I hate that...

-Eric

Where I live there's dense bush almost every where, that's almost as bad. Many times, I can hear wildlife, but I can't see them.

02-03-2019, 11:20 PM   #35
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QuoteOriginally posted by normhead Quote
Yet after all that, how do I know DA 150-450 can't do better?

The issue here being, not so good lenses can do pretty good work if the subject is close enough and the subject doesn't tax it's resolution.... it's at distance that the results of abetter lens are readily noticeable. I was satisfied with my Sigma 120-400 from 8 feet away. Test shots from a KM away were atrocious. Even my old Sigma 70 300 gave good results if the subject was close enough.
Downtown LA (the subject) was about 8 miles (12.8 km) away from my location. I think this bears out your hypothesis.
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