marc petzold

marc petzold

Lives in Germany Germany
Joined on Mar 12, 2014

Comments

Total: 1020, showing: 1 – 20
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In reply to:

RandyPD: Same concept as the old Contax AX, which focuses by moving the film plane. In this case, it moves the lens towards/away from the sensor plane. Nothing new, really.

Exactly my thoughts, and DPR is late with this info, too.

Direct link | Posted on Feb 12, 2016 at 12:31 UTC
On article Heavy hitter: Sony FE 24-70mm F2.8 GM first shots (335 comments in total)
In reply to:

TN Args: "giving Sony's full-frame mirrorless customers a fast, constant standard zoom for the first time"? Anyone remember the Sony Zeiss 24-70 f/2.8? Doesn't that work on Sony mirrorless cameras? Didn't the Sony adapter preserve all functions?

...and the A-Mount Sony Zeiss 24-70/2.8 Mk. I is really expensive, and a beast, from weight & size, too....according to DxO, Mk.II isn't any better, but even more expensive...and here the "G-Master" Sony 24-70/2.8 kicks in for eMount...

Direct link | Posted on Feb 8, 2016 at 18:52 UTC

Soon, a year is gone since the advertising of this Tokina 24-70/2.8 AT-X Pro FX lens, but nobody did a really good review into the meantime - is it better as the cheaper Tamron 24-70/2.8 VC or not?!

Direct link | Posted on Feb 8, 2016 at 18:49 UTC as 1st comment
On article Heavy hitter: Sony FE 24-70mm F2.8 GM first shots (335 comments in total)
In reply to:

Eugene232: Sony started create affordable FF system..
and then forgotten about..

Sony imho does have a patent for a NEX-5 Body with FF sensor - name it A5, as rumoured on SAR last year, and bring it on with Kitlens for 799 bucks, say the already known FE 28-70 lens, so one would miss the EVF from the A7 series, but Sony could gain new ground with a super-cheap FF Mirrorless...but wait...they won't sell many A6300 when going this Route then...currently...
The A7 is down to ~970 bucks new..and the A6000, as well as the new A6300 lacks really a great Kitlens...the SELP1650 doesn't do the body justice...it's simply too bad...useable and so-so at F5.6-8 aperture...

Direct link | Posted on Feb 8, 2016 at 14:06 UTC

"We want to make lenses that can be used forever" - is clearly a joke, considering the built-in AF motors...either USM like, or whatever - will & would brake after years of use, Sony should just look at the mightly Canon 28-70/2.8 L USM Lens - many of them are just MF zooms now only, because the USM is broken, and Canon doesn't have anymore spare parts for repair. Quo Vadis, Sony?! MF Zooms & primes can work for many decades, but they'd need some love in form of lubricant & service after many years, and thus also needed to be handled with some TLC to last some decades.

But every AF drive motor inside the lens would & will fail, it's just a matter of time, and hugely depending onto the usage, and how the lens is being handled, too.

For instance, my MF lenses from the 80's still work nicely, often like new ones, but i use them carefully...some have been already serviced, while others not and still going strong.

Direct link | Posted on Feb 8, 2016 at 13:58 UTC as 15th comment | 2 replies
On article Hands on with Sony's a6300 and G Master lenses (276 comments in total)
In reply to:

fooddudeone: I am looking fwd to the Dxomark speed/ISO scores for this a6300.

I've only found out, just yesterday, that even the older a6000 has a fantastic Dxomark ISO score of 1350. That is pretty impressive for an APSC sensor (Fuji X100 has a 1000 score for example). To put it in better perspective - the 5D classic has a similar ISO score of 1368.

If the new a6300 scores a little bit higher, maybe somewhere in between the 5D classic(1368) and 5DII(1815), I would be very happy with this and wouldn't mind giving up my old FF camera for it.

And the 5D is still fine @ISO3200 with a bit Noise Processing. And i wouldn't give up my old 5D for any APS-C Mirrorless. ;) It's rendering style is something special.

Direct link | Posted on Feb 5, 2016 at 21:55 UTC

A very good read about Sample Variation & Quality Managment, "Optical Quality Asurance" by Roger Cicala, Lens Rentals:

http://www.lensrentals.com/blog/2016/02/optical-quality-assurance

Please read all this about lens testing, sample variation & while it really costs that much, and into the End, makes a good Lens far expensive.

(Because extraordinary tests doesn't come for free)

Direct link | Posted on Feb 5, 2016 at 18:40 UTC as 34th comment
In reply to:

marc petzold: way good interview, DPR Stuff, thanks - more from that, and other camera brands, please.

besides this, about the 50mm/lp: i'd think it's not completely right, ZEISS is testing lenses for 50lp/mm since the 80's, and even more....and here's a great paper to read about MTF curves and resolution in terms of lenses, directly from zeiss:

http://www.zeiss.com/content/dam/Photography/new/pdf/en/cln_archiv/cln30_en_web_special_mtf_01.pdf

And here is part II:

http://www.zeiss.com/content/dam/Photography/new/pdf/en/cln_archiv/cln31_en_web_special_mtf_02.pdf

ZEISS tests *every* lens, back into the 90's when i've bought C/Y Mount lenses, every lens does have a inspection certificate with the matching lens serial no. stamped onto this paper-form card, and i'd guess nothing has changed atm when you buy a current Zeiss lens.

Direct link | Posted on Feb 5, 2016 at 17:55 UTC

I'm wondering if the FE 24-70/2.8 G-Master would optically as good as the mighty Canon 24-70/2.8 II L USM lens...can't wait for the photozone lens review, or lensrentals by Roger Cicala. ;)

Direct link | Posted on Feb 4, 2016 at 22:36 UTC as 22nd comment | 1 reply
In reply to:

MaxFury: I wish they would design G Master Lenses for APS-C. Or a great Macro lens for the a6300.

Just right, but i'd guess it would be too expensive then.
A 16-55/2.8 G-Master would be great for the A6xxx Series, and all other NEX/Alpha eMount Mirrorless, too.

Direct link | Posted on Feb 4, 2016 at 20:58 UTC

way good interview, DPR Stuff, thanks - more from that, and other camera brands, please.

besides this, about the 50mm/lp: i'd think it's not completely right, ZEISS is testing lenses for 50lp/mm since the 80's, and even more....and here's a great paper to read about MTF curves and resolution in terms of lenses, directly from zeiss:

http://www.zeiss.com/content/dam/Photography/new/pdf/en/cln_archiv/cln30_en_web_special_mtf_01.pdf

And here is part II:

http://www.zeiss.com/content/dam/Photography/new/pdf/en/cln_archiv/cln31_en_web_special_mtf_02.pdf

Direct link | Posted on Feb 4, 2016 at 20:25 UTC as 117th comment | 3 replies
In reply to:

marc petzold: Real Life Samples from all new "G-Master" Lenses by Brian Smith, Sony Artisan:

http://briansmith.com/field-test-sony-g-master-24-70-f2-8-85-f1-4-lenses/

There aren't other samples avialable atm...

Direct link | Posted on Feb 4, 2016 at 20:08 UTC

Real Life Samples from all new "G-Master" Lenses by Brian Smith, Sony Artisan:

http://briansmith.com/field-test-sony-g-master-24-70-f2-8-85-f1-4-lenses/

Direct link | Posted on Feb 4, 2016 at 19:59 UTC as 126th comment | 3 replies

Samples from all new Lenses by Sony Artisan Brian Smith:

http://briansmith.com/field-test-sony-g-master-24-70-f2-8-85-f1-4-lenses/

Direct link | Posted on Feb 4, 2016 at 19:56 UTC as 25th comment | 1 reply
In reply to:

Biggiep: I'd honestly prefer Sony delay the release of a body and make a new freaking kit lens. The 16-50mm is absolute trash and those amazing camera bodies deserve better.

I find it acceptable to have a 16-50 Zoom which equals to 24-75mm in FF-terms, with the size not much bigger than a typical pancake prime lens, and i've seen great shots from a SELP1650, check flickr. It's not all about the lens, even it does have un-usual distortions w/o digital corrections. That Zoom is F3.5-5.6 anyway, like most of them, how many Zooms are perfect wide open? Less distortion, but still never perfect at the wide angle. OTOH, i thought Sony would release a Mk. II version of this lens with much less distortion, and better corner-to-corner sharpness, as new Kitlens for the A6300...but nothing happened.

Direct link | Posted on Feb 4, 2016 at 19:20 UTC
In reply to:

marc petzold: The FE 24-70 mm F2.8 GM lens is 2400 EUR here, and it's not even a ZEISS Design. Thanks Sony. I'd get instead the excellent Tamron 24-70/2.8 VC somewhere this year for my 5D, and with an Adapter, i can even use it onto my A7. That's quite better - and way cheaper, too.

Further, no Love from Sony for the A7 I & A7R, A7S Users yet for 14bit uncompressed RAW. So much Love from Sony for 1st Adopters - thanks. Lesson learned.

I know it all about from here, but A7 owners should anyway getting that update.

Direct link | Posted on Feb 3, 2016 at 22:29 UTC
In reply to:

nerd2: It's great that EVF and sensor technology marches on. 8fps AF-C with minimal blackout = (practical) death of OVF.

@surlezi

The Leica SL EVF is known to be very good (with ~4 MP) but the A7 EVF isn't great. The A7 was being sold some days ago with the FE 28-70 for just 1000$. Of course, it's tech from Fall 2013, but still, a 5D takes decent pictures, and so every other camera. I just meant, for 1000 bucks, i'd get a FF camera, either A7 new or mint, or an 5D/D700 Canon or Nikon, for instance.

Direct link | Posted on Feb 3, 2016 at 22:28 UTC
In reply to:

Biggiep: I'd honestly prefer Sony delay the release of a body and make a new freaking kit lens. The 16-50mm is absolute trash and those amazing camera bodies deserve better.

Nope, it's okay at F/5.6 or F/8 Aperture, not "trash", but otherwise relies on heavy lens correction because of native distortion, if you'd shoot the SELP1650 onto a older eMount Body like the NEX5 1. Gen, you'd see the distortions, even into JPEG mode. For RAW Shooters, it's the same like with all other Bodies - just a few Clicks via Lensprofile, either LR or a good Plugin like PTLens, i do prefer this for ages.

Direct link | Posted on Feb 3, 2016 at 21:03 UTC
In reply to:

Eric Glam: Impressive AF and frame-rate, but:
- LCD is very low-res.
- Flash sync limited to 1/160th.
- No touch-screen
- Battery life is too low. Should be at least 600 shots.
- No mention if the 14 bit RAW is lossy or lossless compressed.
- No mention if the menus have been re-arranged to make them easier to navigate and quickly find what you're looking for.
- No IBIS like in the A7r mk2.
- $1000 for the body is a little expensive.

All in all, the camera should be fun to use, but too many negatives to really want one.

...and don't forget the S-Log3 Video feature, Ethan. ;)
But i'd say - for most ppl, it doesn't matter if you're using the A6000 or A6300 in IQ terms. AF is even better, 4K full readout nice to have, better fast-res EVF, too...for those who need or might need it - but, the Sony APS-C thing still is: the 16-70/4 "Zeiss" isn't that good anyway, and also no, new updated SEL-P1650 Kitlens - i'd wish for a better Kitlens, sharp from corner to corner, not a better APS-C eMount Body, they're already quite good enough, but their APS-C Line of eMount lenses, are not there, yet in Quality terms.

Direct link | Posted on Feb 3, 2016 at 20:01 UTC

The FE 24-70 mm F2.8 GM lens is 2400 EUR here, and it's not even a ZEISS Design. Thanks Sony. I'd get instead the excellent Tamron 24-70/2.8 VC somewhere this year for my 5D, and with an Adapter, i can even use it onto my A7. That's quite better - and way cheaper, too.

Further, no Love from Sony for the A7 I & A7R, A7S Users yet for 14bit uncompressed RAW. So much Love from Sony for 1st Adopters - thanks. Lesson learned.

Direct link | Posted on Feb 3, 2016 at 19:16 UTC as 83rd comment | 3 replies
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