Petroglyph

Petroglyph

Joined on Jan 29, 2012

Comments

Total: 361, showing: 1 – 20
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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 53rd comment | 11 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? (433 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 36th comment
On article Should I buy a Canon EOS 6D Mark II? (433 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 134th 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? (733 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? (733 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? (733 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
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.

steelhead3: Thanks for proving my SIM-40 comments - (probable cognitive effects :^).

Link | Posted on Jun 22, 2017 at 20:40 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.

BarnET: I think you were being a little bit too kind to the other two theories. Ask a geneticist to explain the appearance of Rh- blood based on theory of evolution sometime. Not possible. And I think the political powers that be are a little too interested in getting everybody 'vaxxed' - ever heard of SIM-40 virus? Its main two strains weren't removed from Polio vaccine until the 90s and there are likely more strains and they are linked to heart disease among other things. Don't get me started on environmental pseudo-science. It turns out every 'fix' for global warming available only makes the rich richer. What a coincidence. Every day we see an article about global warming in the Washington Post. It's a political rag not a science rag. Who are they trying to convince? The science lemmings already jumped off the grant cliff.
But DPR isn't science either - I'm not surprised they can't differentiate it from engineers talking about process.

Link | Posted on Jun 22, 2017 at 20:28 UTC
In reply to:

davev8: Head line should be "Sony still 3ed after 11 years with no market gain...will 2017 be any different".......Is factually correct

True but the FE 90G and FE 50 macro work pretty well on a aps-c body

Link | Posted on May 29, 2017 at 01:43 UTC
In reply to:

KKnipser: Here is Sonys PR slides from 2 years earlier: https://www.sony.net/SonyInfo/IR/calendar/presen/irday/irday2015electronics/IPandS_E.pdf
Slide #9 is the comparable one.
So in two years they gained +3% market share in mirroless and +3% in compacts, to an average of +1,5% per year. Whoa. ;-)
Nikon lost -8% during those two years.
So Canon DSLRs are still grabbing share from defecting Nikonians more than twice faster than Sony does.

@osv- Ricoh is a corp and Pentax is a brand of camera. Ricoh switched the former Pentax WG water proof camera over to a Ricoh brand camera and also make other Ricoh cameras. We think they've canceled the Pentax Q, so there are no longer any mirrorless Pentax cameras being made. I'm not sure where Pentax brand DSLR are sitting at this point. But the K1, 645Z , K70 and K3II have been good sellers, AFAIK.

Link | Posted on May 29, 2017 at 01:36 UTC
In reply to:

Kirk Bruner: Regarding battery life, when, exactly did the Sony a99 II become a live-view-only camera? Also, "drool" is spelled with one "L".

Doesn't A99II have a semi translucent mirror? Or did Sony drop that?

Link | Posted on May 21, 2017 at 13:18 UTC
In reply to:

Petroglyph: Did you invent a new class in the middle of picking your best in Semi-Pro class? Is being the top pick of the new "Money is No Object" class a good thing or a bad thing? Does that mean the A7RII is the most "Money is No Object" of the bunch. It does hold together a little thematically with picking the cheapest "Lump-O-Plastic" as the best I suppose.
Suggested new classification: "They're all just disposable consumer electronics now" class. Pick least expensive = done. :^)

Yes, trying to think about it is making my head hurt. Why didn't 5D4 win either category? I suppose it is best not to over think it. I don't imagine 5D4 sales to pros are hurting much.

Link | Posted on May 21, 2017 at 13:05 UTC

Did you invent a new class in the middle of picking your best in Semi-Pro class? Is being the top pick of the new "Money is No Object" class a good thing or a bad thing? Does that mean the A7RII is the most "Money is No Object" of the bunch. It does hold together a little thematically with picking the cheapest "Lump-O-Plastic" as the best I suppose.
Suggested new classification: "They're all just disposable consumer electronics now" class. Pick least expensive = done. :^)

Link | Posted on May 20, 2017 at 16:14 UTC as 71st comment | 2 replies
On article Sony FE 100mm F2.8 STF gallery and first impressions (316 comments in total)

Very nice lens. Thank you for posting the gallery, DPR.

Link | Posted on May 10, 2017 at 18:51 UTC as 11th comment
Total: 361, showing: 1 – 20
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