Petroglyph

Petroglyph

Joined on Jan 29, 2012

Comments

Total: 369, showing: 1 – 20
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On article Canon unveils stabilized EF 85mm F1.4L lens (530 comments in total)
In reply to:

lukecookphoto: I don't think this is a focal length that benefits as much from stabilisation but I still welcome it. Wonder if Nikon or Canon will be the first to stabilise their DSLRs, Pentax figured it out already!

This is an interesting question. Pentax is stabilizing Sony sensors the same as Nikon uses so I'd think Nikon could work a deal directly with Ricoh if they wanted to. They could throw Ricoh an AF/C bone = win win. Imagine a D850 with IBIS & Pixel shift. Canon might have to design their own system. For both the big boys it means selling less expensive lenses without IS/VR inside so I wonder if they'll do it.

Link | Posted on Aug 30, 2017 at 15:21 UTC
On article Ricoh launches Pentax K-1 Limited Silver Edition (175 comments in total)
In reply to:

ZeBebito: Completely irrelevant launch.

ZeBebito: With matching irrelevant comment.

Link | Posted on Aug 25, 2017 at 18:07 UTC
On article Ricoh launches Pentax K-1 Limited Silver Edition (175 comments in total)

Looks like the silver 31 ltd. on the picture. That certainly looks good. This camera is 1-1/2 years old already? Time-flies.

Link | Posted on Aug 25, 2017 at 17:57 UTC as 22nd comment
In reply to:

Ian: "That said, we're aware that a great many people primarily shoot JPEG. " Is that really true? I'm not saying it isn't, but in 2017, it seems surprising.

Is everyone with a phone shooting JPEG? Also, the JPEG engine is getting really good on some cameras now.

Link | Posted on Aug 14, 2017 at 14:07 UTC
On article Humor: The 'horrifying' truth about radioactive lenses (176 comments in total)

"Just living on Earth is more 'dangerous' than these lenses."

That would be true in any case wouldn't it? Since the lenses are on earth. And the sum total of the risks has to be larger than any part of the risks. :^)

Link | Posted on Aug 2, 2017 at 00:11 UTC as 21st comment | 1 reply
In reply to:

Lucas_: I believe DPR should publish a comparison test of the 24-70mm f2.8 lenses - Sigma, Tamron, Tokina, Nikon, Canon and Sony ( both A and E mounts )! It's probably the most popular focal range for a zoom lens, IMHO.

Add the Pentax 24-70 to the mix. I've always wondered if the coatings and fixed IS group make any difference in overall IQ.

Link | Posted on Jul 31, 2017 at 13:11 UTC
In reply to:

Lucas_: Looks to be a very good lens, as was the previous model ( in spite of soft corners ). Major deal breakers for me are the humongous weight and not having a Sony FE mount model ( c'mon Sigma, time to embrace the future... ).

Well at 1020 gm it seems a bit massive for the A7 series. Perhaps Sigma feels the 800 gm native 24-70 GM will be difficult to compete against despite the price difference.

Link | Posted on Jul 31, 2017 at 13:09 UTC

"The target in this photo is a generic pattern to demonstrate the equipment;"
At least it didn't say 'geriatric' :^)

Link | Posted on Jul 24, 2017 at 14:37 UTC as 22nd comment
In reply to:

Petroglyph: Wouldn't a whole new range of prime lenses need to be developed to match a curved sensor. Admittedly, in theory, the lenses could be made a lot simpler and more cost effectively. Perhaps without the need for as many corrective elements. Zooms would be a whole 'nother set of issues though.

Yes, but the whole point of this is to allow simpler lens formula without all the corrective elements. So why go to the trouble of a curved sensor and then design a bunch of new corrections.

Link | Posted on Jul 22, 2017 at 18:13 UTC
In reply to:

Petroglyph: Wouldn't a whole new range of prime lenses need to be developed to match a curved sensor. Admittedly, in theory, the lenses could be made a lot simpler and more cost effectively. Perhaps without the need for as many corrective elements. Zooms would be a whole 'nother set of issues though.

Magnar W: The key question is, does the curvature of the lenses focal plane change based on focal length setting in a zoom. I think it does.

Link | Posted on Jul 21, 2017 at 23:41 UTC

Wouldn't a whole new range of prime lenses need to be developed to match a curved sensor. Admittedly, in theory, the lenses could be made a lot simpler and more cost effectively. Perhaps without the need for as many corrective elements. Zooms would be a whole 'nother set of issues though.

Link | Posted on Jul 21, 2017 at 17:00 UTC as 65th comment | 12 replies
In reply to:

ogl: K-1 is outstanding in terms of noise.

nicolaiecostel: 1000?

Link | Posted on Jul 20, 2017 at 13:24 UTC
On article Should I buy a Canon EOS 6D Mark II? (447 comments in total)

I got a lot of use out of my 6D MkI. I don't think I'd use the Mk II nearly so much. The industry keeps moving on. It does seem like a nice camera.

Link | Posted on Jul 20, 2017 at 00:48 UTC as 45th comment
On article Should I buy a Canon EOS 6D Mark II? (447 comments in total)
In reply to:

steelhead3: Great upgrade for the Canon folks...sort of like the American 60's when car fins were the rage.

rz350: You're putting a 10000$ lens on a 2000$ camera?

Link | Posted on Jul 20, 2017 at 00:44 UTC

I always run Linux distros so haven't needed a hardware upgrade in years. Windows 10.1, or whatever, is in a (subordinate) partition dual boot and every once in a while I boot it up to reminisce about being attached to the 'matrix'. I got the 'Don't turn off computer while performing updates (and reporting your activity to the mother ship)' message the other day while windows was booted up. :^) Brought back fond memories. But there is still windows software that I run so...

Link | Posted on Jul 18, 2017 at 12:49 UTC as 141st comment
In reply to:

falconeyes: The same NR commentor now also cited another Japanese news article (featured comment on NR). IMHO, this other article does make a lot of sense and puts the current quotes from Nikon into a broader context.

Nicely, the Google translation can be read as is. So without further ado, here it is (split into pieces because of length restrictions)
Google translation:

falconeyes: Thank you for the translation & interpretation. If they had improved QA/QC beginning 4/5 years back, I might still be shooting Nikons myself. The A7RII/Pentax K1 combo I'm using now is too good. They've some catch up to do on features (eye AF, Focus peaking, IBIS, Pixel shift), IMO. I always cheer for the underdog to push tech forward of the leaders. I don't know what to think abut Nikon. Are they an underdog yet?

Link | Posted on Jul 14, 2017 at 16:36 UTC
On article Sony a9 banding issue: fact or fiction? (734 comments in total)

Below poster sushidharma claims turning on the AA filter of his Pentax K-S2 (500$) fixed the LED banding issue he was seeing. I realize Sony has used a more complicated, intermediate, method of unloading the sensor and this seems to yield taller bands. I think the Nikon D500 has retained the AA-filter as has the Canon 7DII. Does the Sony A9 have an AA-filter or did they leave it out of the sensor stack like in the A7RII? With the taller bands the AA-filter is unlikely to make any difference anyway but just wondering.

Link | Posted on Jul 4, 2017 at 13:47 UTC as 13th comment
On article Sony a9 banding issue: fact or fiction? (734 comments in total)

On the bright side, if Sony release a MkII version fairly soon the price of the Mk I should fall quite a bit. I'm waiting to see what the A9R is like though. It should be quite an interesting spec.

Link | Posted on Jun 30, 2017 at 18:26 UTC as 52nd comment | 1 reply
On article Sony a9 banding issue: fact or fiction? (734 comments in total)
In reply to:

Mac McCreery: Far less a problem than human error then.

But human error X gear error X reporting error X reading comprehension error = a lot of error. :^)

Link | Posted on Jun 30, 2017 at 18:16 UTC
On article Now we know: Sony a9 is sharper than we thought (394 comments in total)
In reply to:

RCicala: Being scientific isn't about having the right answer. It's about trying to get the right answer and being transparent in your methodology so that others can constructively critique your methods and make them better. And then the hard part - going 'we made a mistake, we're fixing it'.

The easy thing is not show methods, not accept criticism, and scream "I'm right" louder than anyone else. It's easy. But it's bad science.

My compliments and admiration for doing the hard thing. I've had to do it several times.

But I like the A9 camera - FWIW. :^)

Link | Posted on Jun 22, 2017 at 20:52 UTC
Total: 369, showing: 1 – 20
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