Tom Schum

Tom Schum

Lives in United States Washington DC area, AK, United States
Works as a Electronics
Joined on Aug 30, 2010
About me:

Photo hobbyist

Comments

Total: 83, showing: 1 – 20
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In reply to:

Tom Schum: Things I wish they would think about, from the viewpoint of a Fuji mirrorless user:
Weather resistant build. Fuji has some of these now, bodies and lenses.
Detachable rear LCD (usually I don't need it because the EVF is that good). Too soon to expect this kind of innovation though.
Short flange distance goes without saying.
Big battery. Fuji and most others have smaller batteries that don't run for long.
Functional adapters for legacy lenses (Fuji makes only one so far as I know, an excellent M-mount adapter). Nikon would have to do at least two, so all legacy Nikon lenses would be supported (full manual in the worst case, but supported without leaving the Nikon garden).
I hope they will decide to leave video out of the equation, or produce a strictly video alternative.
Small lenses please! Fuji has only recently started with some of these and the idea is a very good one. Nikon needs only one lens to get the mirrorless product going, then users will use adapters.

While this was my original thought, the idea that the LCD display could be remote on a nearby smartphone did not occur to me. This seems like a great idea to me. I could do without the LCD display, or I could use a smartphone as a display. In fact, why even bother with a rear LCD when a remote link to a smartphone will deliver a better display! The EVFs are now getting so good that the rear LCD is merely a convenience.

Link | Posted on Sep 21, 2017 at 01:24 UTC

Things I wish they would think about, from the viewpoint of a Fuji mirrorless user:
Weather resistant build. Fuji has some of these now, bodies and lenses.
Detachable rear LCD (usually I don't need it because the EVF is that good). Too soon to expect this kind of innovation though.
Short flange distance goes without saying.
Big battery. Fuji and most others have smaller batteries that don't run for long.
Functional adapters for legacy lenses (Fuji makes only one so far as I know, an excellent M-mount adapter). Nikon would have to do at least two, so all legacy Nikon lenses would be supported (full manual in the worst case, but supported without leaving the Nikon garden).
I hope they will decide to leave video out of the equation, or produce a strictly video alternative.
Small lenses please! Fuji has only recently started with some of these and the idea is a very good one. Nikon needs only one lens to get the mirrorless product going, then users will use adapters.

Link | Posted on Sep 18, 2017 at 00:00 UTC as 126th comment | 5 replies
On article Hands-on with the Sony Cyber-shot DSC-RX10 IV (338 comments in total)

I almost fell for the RX10 III but the image quality just was not there.
Compare with Fuji X-A3 and two-lens kit for $699 (16-50mm and 50-230mm): no EVF and two lenses to swap, and less video support, and pretty good image quality from the APS-C 24mp sensor.
But I'm not a superzoom bridge cam fan. In this sector the RX10 IV is definitely the leader.

Link | Posted on Sep 13, 2017 at 12:53 UTC as 35th comment
In reply to:

Mirrorlessy19: Nothing against Nikon, but I would never buy a camera with OVF, super loud flipping mirror and awful CDAF in live view & video

Maybe they will put the D850 guts inside a short flange distance mirrorless body and focus with CDAF. It could be a game changer and/or a Sony killer. Could this be the next big thing from Nikon?

Link | Posted on Aug 26, 2017 at 01:29 UTC
In reply to:

Tom Schum: Interesting that the labor department tried first to get an informal agreement with B&H to fix the problems, and failed at this. So they had to bring the lawsuit to get the problem fixed.
Many thanks to DPR for linking to an in-depth story in the article above. My wife worked in this area as a lawyer, and found all this very interesting.
I can see that having a homogenous ethnic workforce in the warehouses could lead to a more efficient and conflict-free operation, but we don't do this anymore!

Many cases here, thanks for posting the link. My wife is retired for over 10 years now, not paying close attention to the field.

Link | Posted on Aug 17, 2017 at 12:53 UTC

Interesting that the labor department tried first to get an informal agreement with B&H to fix the problems, and failed at this. So they had to bring the lawsuit to get the problem fixed.
Many thanks to DPR for linking to an in-depth story in the article above. My wife worked in this area as a lawyer, and found all this very interesting.
I can see that having a homogenous ethnic workforce in the warehouses could lead to a more efficient and conflict-free operation, but we don't do this anymore!

Link | Posted on Aug 17, 2017 at 12:25 UTC as 24th comment | 2 replies
On article Sony's Mavica FD71 liked floppy disks, hated magnets (80 comments in total)
In reply to:

Jim Salvas: This was the camera that enabled eBay. It was perfect for the job of taking closeup photos of little knickknacks and collectibles, plus the floppy drive was something every user understood intuitively. Take the pic. Put floppy in computer. Post eBay auction.

It did the job so well that frequent eBay sellers and website owners were still clinging to these early models a decade later and refusing to consider anything beyond the floppy.

A co-worker had one, specifically for ebay. I really wanted one. A few months later I bought a Minolta 2MP Dimage 10. Way smaller, but the sd card made everything harder.

Link | Posted on Jun 29, 2017 at 13:54 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

Androole: This is also a system that is crying out for IBIS.

It would be interesting if Sigma was interested in licensing out the rights to the Foveon sensor.

An Olympus OM-D (or Panasonic G) with a Foveon sensor would be an amazing 2nd camera for an M4/3 system, giving outstanding image quality, IBIS to eliminate the need for tripods while still allowing base ISO shooting, and with a huge lens system and a rock solid feature set and ergonomics...

One can dream...

Early on, Foveon was a separate company. They offered the sensor tech on the general market, but only Polaroid bought into it, and for just one point-and-shoot. Basically, nobody wants Foveon. Except Sigma, thankfully.

Link | Posted on Jun 1, 2017 at 00:22 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

Scottelly: On first inspection, this looks like a very weird review. 7 pages with specs on the last page? Is this how all the new tests are being done? If not, why is this test like that?

BTW, thank you for reviewing this camera. I was hoping DP Review would take the SD Quattro H seriously enough to review it. I do think Sigma deserves for it to get the recognition it is getting. It's a $1,200 camera that competes with the best full-frame cameras and even the medium format cameras, when used at ISO 100 or ISO 200. That's saying a lot, I know, but after inspecting the photos closely, I think you'll agree that the SD Quattro H comes close to the image quality of the Pentax 645Z, as does the Canon 5 Dsr and the Sony A7r II.

In my small mind, as a Sigma user, it is worthwhile to trade some dynamic range for per-pixel sharpness.
I have other cameras, bayer and X-trans, and their worst weakness is per-pixel sharpness. I get past this by downsizing to 1/4 of the original pixels, and I get the better dynamic range that these sensors offer as well. But, I think dynamic range is a little bit overrated in most cases. At least that's my opinion.

Link | Posted on Jun 1, 2017 at 00:20 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

FLruckas: They should really make a version of these cameras in a Canon mount....

I'd strongly consider one then.....

In the past there have been third-party specialty craftsmen who would convert your Sigma to Canon mount. Maybe they are still out there.
Of course it voids all the warranties and there is no guarantee that any of the Canon lenses would work properly, but you would have to spend a lot of money on a camera and the conversion step in order to find out. Maybe it is better to just buy one SA mount lens.

Link | Posted on Jun 1, 2017 at 00:17 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

Josh Leavitt: I really wish Sigma would have gone the extra mile and made this a full-frame sensor. The extra resolution from the larger sensor might have turned a few more heads when combined with the Foveon detail, even if the final cost were to fall between $1999 and $2599. The pixel pitch for the top blue layer of this APS-H is 4.3um, so the full frame resolution would be 46.7MP (8370x5580); Sigma could have directly challenged studio photographers using the a7R II, D810, or 5DSR had they gone that route.

Agreed, and including the images from the sd Quattro non-H as well. I get great large poster prints out of this camera.

Link | Posted on Jun 1, 2017 at 00:12 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

PropaPH: How is this camera for left eye shooters? looks like you might be picking your nose with your right thumb...

I shoot my sd Quattro left-eyed with no problems. The EVF extends plenty far back behind the control surfaces and the monitor. No nose issues for me. I've felt no need to learn how to shoot right-eyed.
Plus, the diopter range is pretty wide as well, handy for me a near-sighted glasses wearer. But the view with my glasses on is just fine, so I can use regular diopter settings.

Link | Posted on Jun 1, 2017 at 00:09 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

henning kraggerud: Maybe the best solution now,( if you are not heavily invested into any system, and want some of the Art Lenses,) would be to buy them in SAmount with this camera and Sigmas AF adapter to use them with a Sony mirrorless for when you might need low light or huge DR.
Isnt that best of 2 worlds?
Or am I missing something?

A great point was made in favor of monochrome shooting, since the image is not interpolated. Easily as good as Leica Monochrom in my opinion.

Link | Posted on Jun 1, 2017 at 00:07 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

piratejabez: Does anyone else think the green feathers in the corners appear mushy compared to the Merrill? (This is something most cameras seem to struggle with.)

In fact, ironically, I'm seeing a lot of mushy colors in general.

Sometimes the internet makes the view muddy.
Best to download the image file from the sample image gallery, then look at it in your favorite software.

Link | Posted on Jun 1, 2017 at 00:06 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

xpatUSA: "photons of different colors have different amounts of energy and more energetic light would penetrate further into the chip."

OOPS, Richard!

Yes, and information from each red sensel would be used in 4 pixels of the final image. The same information, used in 4 different pixels of the final image.
In Sigma we use lower layer information from one sensel in 4 different pixels of the final hi-res image. Quite similar, except that the lower layer information is from a sensel 4 times the area of the top sensels. Complicated!

Link | Posted on Jun 1, 2017 at 00:03 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

Paul Petersen: As a Foveonista all I can say is thanks for the absolute fair assessment of the state of X3. Although I think for someone who wants to dabble in Foveon the standard non H model is a much better value costing 400 dollars less for only 5 fewer MPx.
Too bad they have lost the DR that they had in the sensor back in the SD14 days that was one of the best things about it when it was relevant.

Have you tried lo-res? Still lacking DR?
If DR is better, we get back close to original X3 Foveon. This is interesting because the surface area per pixel is about the same in lo-res as it is for original X3 Foveon.
If DR is not better, something has been lost.

Link | Posted on May 31, 2017 at 23:56 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

Amnon G: What I don't get is the quickly degrading high ISO performance. Is the sensor itself (or the layers) not up to par with other manufacturer sensors (like the ubiquitous Sony sensors, for example) or is it an inherent problem in layering the RGB sensors?
Just look at ISO 1600 and it's a mess. 3200 and 6400? Forget about it.
Great SNR in good light is becoming less and less a worthy trick, no matter what the sensor size is. At least for me as much as I like the idea of losing the demosaic algorithms of all other sensors I cherish the flexibility of taking photos in less than ideal light without setting up lights, which I suspect most people appreciate higher ISO performance over ideal-light performance.

I'm guessing that after 10 years and more developing the technology, Sigma would have given us their best. This is what we have, and further fundamental improvements are unlikely in my opinion.
Most Sigma owners have other cameras if they need versatility and low light performance.

Link | Posted on May 31, 2017 at 23:55 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

jsimoespedro: From pixel peeping at ISO100
1) Raw output is terrible.
2) JPEGS are amazing.

?

The assumption is that most users of other camera systems will HATE Sigma Photo Pro software. To see good results from the more nearly "normal" software these users are familiar with, well it is a powerful testimony to the usability of the camera. Great for users of other camera systems.
The other thing nice is that for $999 you can get a sd Quattro with a 30mm F1.4 Art lens.

Link | Posted on May 31, 2017 at 23:52 UTC
On article Sigma SD Quattro H Review (640 comments in total)
In reply to:

obsolescence: I'm attracted to the Foveon cameras, but uncertain of their usefulness in professional practice. As stated, it’s not likely to be my “only” camera — that is definitely true. But will it be compatible with my existing system (and with another one that I plan to acquire)? I see that as a problem not just in terms of lenses but mainly the significantly different color-tonal rendition. If I’m shooting a series for a project, all the individual shots need to be fairly consistent. Other than the desirability of fine detail, I’m not sure the Foveon rendering would be an enhancement or a detriment, unless it were to be used singularly.

Foveon is fundamentally different, maybe too much to expect parity with any existing photo system.
Personally I prefer Foveon but this is a personal choice.
Compatibility is not going to be part of the equation. The rendering of Foveon is unique, as is the sensor. I'm glad you find it interesting. My first Foveon was a DP2 (non-M, non-Q) for $500. I tried other stuff but for me Foveon can't be beat.
If I need versatility and low-light capability I have other cameras for that. Most Sigma owners do too.

Link | Posted on May 31, 2017 at 23:47 UTC

So far, we haven't seen a DSLR that allows OVF and EVF through the same viewfinder (like the Fuji XPro).
The Sigma sd Quattro and sd Quattro H cameras use the full-size Sigma SA-mount, so that owners of any Sigma lenses can just simply use them without hassle. No leaky fiddly adapters. No fumbling in the field.
The K-01 would have done much better if it had an EVF. I believe this is the reason it did not sell well. Any Pentax lens fit and worked, no adapter needed.
The Sigma mirrorless offering is also big, plenty big enough to get a good grip on it for using the big lenses. Maybe too big for lots of people. This is not a small-body mirrorless.
The Sigma mirrorless body is the perfect platform to use to develop a "fix" for the PDAF/CDAF dilemma. And, they are continually upgrading the firmware to autofocus better with their existing line of Art lenses.
Sure, the Sigma sensor leaves much to be desired, but they've put it into a practical mirrorless body.

Link | Posted on May 26, 2017 at 14:12 UTC as 8th comment | 1 reply
Total: 83, showing: 1 – 20
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