PIX 2015
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, Sigma user


Total: 20, showing: 1 – 20
On Leica Q First Impressions Review preview (579 comments in total)

At the lower end, competition is the Sigma DP1M and DP1Q with 28mm FF equivalent fields of view. Also we have the Ricoh GR with the same field of view and much better high-ISO performance than the Sigma. You can buy all three for less than the price of this new Leica (it goes without saying).
Why is Leica finally going down this road? I think it's a good idea to put a fixed lens in front, with an internal leaf shutter. You can control all aspects of the optical performance and there is no worry about how the camera might perform (or not) with different lenses attached. Dust ingress is another big problem somewhat mitigated by this approach, as others have said.
I think Leica chose a good focal length but again Sigma is going to be ahead of the game with its DP0Q (21mm FF equivalent).
The Leica idea of adding crop settings in-camera is a brilliant innovation, and when you have a high resolution sensor and a top quality lens you aren't going to lose much by cropping large.

Direct link | Posted on Jun 11, 2015 at 01:12 UTC as 114th comment | 1 reply

The Sigma Merrill sensors operate entirely without interpolation between adjacent pixels. They do quite well with monochrome. It is valid to say that all OTHER sensors require and use interpolation.

Direct link | Posted on Jun 2, 2015 at 23:06 UTC as 111th comment | 5 replies
On A Compact PEN: Olympus Stylus SH-2 Hands-on article (150 comments in total)

The use of a ND filter instead of a proper iris probably makes sense in a camera such as this, but the improvement in sharpness that usually comes with stopping down a little bit will be completely missing. Basically the lens needs to be very good wide open at all focal lengths because it will always be shot wide open whether the ND is in or out. It is probably adequate...
The compact camera market has been considerably smaller since cellphones took over, leaving a couple of niches for a good compact to fill. One is superzoom and the other is rugged.
Raw is a good feature. I went with the rugged Ricoh WG-4 GPS and I do wish it supported raw capture!

Direct link | Posted on Mar 11, 2015 at 11:43 UTC as 35th comment
On More things we found cut in half (CP+ 2015 edition) article (137 comments in total)

Nobody will cut the price in half. Too much respect for the optics!

Direct link | Posted on Feb 17, 2015 at 20:09 UTC as 7th comment
On DSCF4826_HD photo in Tom Schum's photo gallery (2 comments in total)
In reply to:

JohnLindroth: great use of the fisheye perspective. How do you like this lens on the x-e1?

It's a lot of fun to use, and very easy. Glad you like this shot!
Clarity is very good and this is only last year's model.
The new one is supposed to be even better.
But, the perspective is only of limited usefulness and for occasional use.
I find the 12mm F2 Samyang interesting and hope to see it come out branded "Samyang" instead of other names. All my Samyang lenses so far are Samyang branded, and for some unknown reason the selection of these is limited relative to the other branding.

Direct link | Posted on Sep 23, 2014 at 01:20 UTC

I have a Samyang 85mm F1.4 in the Samyang x-mount version.
Yes you could use a third party adapter to mate the lens to my Fuji X-E1 but users have reported inconsistent performance of the lens using third party adapters.
If I were buying this 50mm F1.4 lens for my Fuji X camera I would prefer the Samyang implementation that mates directly to the camera. Samyang controls all parameters of this mount and how it is integrated into the lens. So, avoid problems and questions and buy the Samyang version that mates directly to your camera. If performance is not as specified you can legitimately blame the lens itself and you won't be wondering about the adapter.
By the way, the 85mm is superb.

Direct link | Posted on Aug 27, 2014 at 16:51 UTC as 8th comment
On A look at the Lomography Petzval 85mm F2.2 lens article (171 comments in total)
In reply to:

Tom Schum: If I were a working portrait photographer, this would be a must-have!

If I'm not mistaken low chromatic aberration is a hallmark of the Petzval design. Films of the time were sensitive to ultraviolet so to get good focus the lens had to treat the colors mostly the same.

Direct link | Posted on Jul 2, 2014 at 18:14 UTC
On A look at the Lomography Petzval 85mm F2.2 lens article (171 comments in total)

If I were a working portrait photographer, this would be a must-have!

Direct link | Posted on Jul 2, 2014 at 16:37 UTC as 92nd comment | 7 replies


Direct link | Posted on Jun 14, 2014 at 15:21 UTC as 72nd comment

If Sigma is working on a new DSLR or Mirrorless camera, this fine might put a serious dent in their schedule. We might be stuck with another year of delay in the Sigma development process.
On the one hand, patent infringement is a serious problem and ought to be enforced with fines. On the other hand there can be far-reaching effects against competition in a case such as this. Since Nikon was asking for ten times as much money as they actually got, the judgement seems lenient to me.
Thinking about in-lens image stabilization in general, it seems to me that there is not a whole lot of choice regarding how to do it: move a lens or an element of a lens. In-camera image stabilization is a similar situation: you move a sensor.
Either way, one false move and you have re-invented something previously patented, and there will be infringement issues to deal with. I doubt Sigma had any criminal intent. This is an area for the patent trolls.

Direct link | Posted on Mar 12, 2014 at 12:55 UTC as 24th comment | 3 replies
On Welcome to our studio test scene article (275 comments in total)

The resolution lineset now goes to 50, but since the phase 1 IQ180 easily resolves this, my impression is the resolution lineset is going to soon be useless.

Direct link | Posted on Sep 18, 2013 at 23:12 UTC as 62nd comment

I still remain attracted by the latest and the greatest. As a previous poster said, financial limitations tend to moderate GAS.
At any moment I'm ready to drop $1000 on a new lens, or a new camera. Soon, the money might be there. Meanwhile I am enjoying using my existing equipment, and wondering why I want to buy more stuff.
Perhaps the best I can hope for is to be a recovering GASaholic.

Direct link | Posted on Jul 10, 2013 at 14:12 UTC as 67th comment
On Just Posted: Pentax K-5 II / K-5 IIS Review article (268 comments in total)

Looks like the K5 IIs makes a generally crisper and clearer photo. Too bad my X-E1 gives me a moire-free view of the resolution test chart. Perhaps the limits of bayer CFA technology have been reached.

Direct link | Posted on Jun 5, 2013 at 16:13 UTC as 18th comment | 1 reply

Quite a large lens, compared to the 18-55.

Direct link | Posted on Mar 6, 2013 at 16:36 UTC as 27th comment | 1 reply
On Nikon issues service advisory on D600's dust issue article (240 comments in total)

These hi-res sensors see ALL!
Also a serious issue with my Sigma SD1.
Will try (again) to set up a sensor cleaning service with Sigma USA.

Direct link | Posted on Feb 24, 2013 at 14:25 UTC as 26th comment
On A Serious Rangefinder Compact Camera article (137 comments in total)

A Sigma DP2M with interchangeable lens mount on the front. That's all I wish for.
At this rate I might have to settle for a Fuji X-Pro1 instead.

Direct link | Posted on Oct 22, 2012 at 00:09 UTC as 28th comment

If Fuji can pull this off with good success, their XPro-1 sales will see a boost.

Direct link | Posted on Mar 13, 2012 at 00:42 UTC as 69th comment

I think we are watching the end of the point-and-shoot: with phones getting this good, there is no longer a need for them.

Direct link | Posted on Feb 28, 2012 at 01:53 UTC as 127th comment

An image of mine remains mine only until somebody else complains that my image is too much like one of theirs.
This is depressing!

Direct link | Posted on Jan 30, 2012 at 00:59 UTC as 35th comment
On Preview:sigmasd1 (56 comments in total)

When will DP Review produce a full review of the SD1?

Posted on Aug 8, 2011 at 16:12 UTC as 21st comment | 1 reply
Total: 20, showing: 1 – 20