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03-31-2015, 02:12 AM   #496
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QuoteOriginally posted by Cynog Ap Brychan Quote
What I would like to know is whether the 70-200 focus breathes like the Nikon, or does it more resemble the Canon in this respect?
You mean noisy? You can't almost here it works at all..almost total silence.

03-31-2015, 02:18 AM   #497
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QuoteOriginally posted by kenspo Quote
You mean noisy? You can't almost here it works at all..almost total silence.
No, I mean the fact that the Nikon's focal length shortens considerably at the 200 mm end when it is focused on close subjects (it becomes closer to 120 mm). The Canon maintains its focal length much better, according to Tony Northrup.
03-31-2015, 02:36 AM   #498
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QuoteOriginally posted by Cynog Ap Brychan Quote
No, I mean the fact that the Nikon's focal length shortens considerably at the 200 mm end when it is focused on close subjects (it becomes closer to 120 mm). The Canon maintains its focal length much better, according to Tony Northrup.
Sorry, not enough coffee yet That kind of testing i haven't done yet. But will do
03-31-2015, 02:50 AM   #499
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QuoteOriginally posted by kenspo Quote
200, 300, 70-200 and 150-450 side by side without hood on
Wow. The big boys from Pentax look formidable. Poor old DA*300 is dwarfed.

Out of curiosity, do you have your old Nikon 70-200 around, just to see how it looks against the 70-200 Pentax?

03-31-2015, 02:53 AM   #500
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QuoteOriginally posted by rawr Quote
Wow. The big boys from Pentax look formidable. Poor old DA*300 is dwarfed.

Out of curiosity, do you have your old Nikon 70-200 around, just to see how it looks against the 70-200 Pentax?
hehe..yes, the 300 is small on the side of these big boys No, sorry..i sold everything Nikon when i signed for Ricoh! But can see if i can do it when i see some of my colleagues
03-31-2015, 04:04 AM - 1 Like   #501
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QuoteOriginally posted by monochrome Quote
BMC isn't a good gauge of currency equivalency. Article on The Big Mac Index from The Economist.
As stated it's a "simple way of comparing things". No, it's not accurate, yes it's fun, and no it doesn't have real economic value, but who really cares when we talk about lenses and burger ?
03-31-2015, 04:22 AM   #502
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I have the older 70-200 from Nikon, it doesn't have the focus breathing issue. The newer one is better on full frame though.
03-31-2015, 05:28 AM   #503
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QuoteOriginally posted by bhairavp Quote
I have the older 70-200 from Nikon, it doesn't have the focus breathing issue. The newer one is better on full frame though.
The newer Nikon does have focus breathing issues. As you zoom in to 200mm the minimum focus distance increases and you basically end up with a 135mm lens instead of a 200mm because you have to step back.

QuoteOriginally posted by Cynog Ap Brychan Quote
What I would like to know is whether the 70-200 focus breathes like the Nikon, or does it more resemble the Canon in this respect?
According to a couple of people the Pentax does not breathe as you zoom in.

03-31-2015, 06:18 AM   #504
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yep, I know. I have the VR1,which doesn't have the focus breathing issue. I shoot DX, so the corners on fx are not relevant.
03-31-2015, 09:34 AM   #505
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Honestly this "Focus breathing" is a non issue if the lens has got the right magnification, as the key question is what do you want to achieve?

The old Nikkor das have relatively little focus breathing (it is actually 177mm at the nfd), but that doesnt help it much with the nfd being a clumsy 1,5m for this short tele reach.

Usually People want magnification. This is where the old great Tamron 70-200 shines with x0,32 versus x0,16 of the old Nikkor (and x0,12 of the new one).

The DFA is 122mm at the nfd with a max magnification of x0,13 (the actual focal length can be calculated quite easily).


The real sucker here is the new Sony FE 70-200 with a mere 108mm remaining at nfd (and a magn. of x0,13).
03-31-2015, 12:33 PM   #506
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QuoteOriginally posted by Stavri Quote
The MTF curve on the pentax 70-200 shows better performance than the Nikon/Canon equivalents, but that looks to be measured on the Aps-C from the nature of the curve. On FF he falloff should be greater. The camera sensor plays a role on the mapping of said performance. Pitting the K3 vs D810 is not an optimal comparison, we have to wait for the FF to truly know which is the best optically.
I think that FF both side. Both graph show distance in mm and both stop a 20mm from center.
03-31-2015, 10:01 PM   #507
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QuoteOriginally posted by HavelockV Quote
Honestly this "Focus breathing" is a non issue if the lens has got the right magnification, as the key question is what do you want to achieve?

The old Nikkor das have relatively little focus breathing (it is actually 177mm at the nfd), but that doesnt help it much with the nfd being a clumsy 1,5m for this short tele reach.

Usually People want magnification. This is where the old great Tamron 70-200 shines with x0,32 versus x0,16 of the old Nikkor (and x0,12 of the new one).

The DFA is 122mm at the nfd with a max magnification of x0,13 (the actual focal length can be calculated quite easily).


The real sucker here is the new Sony FE 70-200 with a mere 108mm remaining at nfd (and a magn. of x0,13).
Focus breathing is a big issue for shooting video. If a lens breathes while you pull focus, it can be very distracting and very noticeable. It could, in fact, be a deal breaker if it is bad enough.
03-31-2015, 10:52 PM   #508
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Did not see this posted here. A link NedB posted on DPR. Looking good.




https://instagram.com/p/0lebpPBrsg/
04-01-2015, 12:14 AM - 1 Like   #509
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QuoteOriginally posted by vcollerp Quote
A link NedB posted on DPR. Looking good.
It looks OK, I guess. But, while I don't want to sound negative, at f7 (plus using lots of flash), any 70-200mm lens on the planet would probably be good enough to resolve a few dark eye-lashes near the centre of the frame at 3 metres.
04-01-2015, 12:45 AM   #510
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QuoteOriginally posted by Stavri Quote
The MTF curve on the pentax 70-200 shows better performance than the Nikon/Canon equivalents, but that looks to be measured on the Aps-C from the nature of the curve. On FF he falloff should be greater. The camera sensor plays a role on the mapping of said performance. Pitting the K3 vs D810 is not an optimal comparison, we have to wait for the FF to truly know which is the best optically.
You can see the image circle radius on the bottom of the chart...
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