Rick Knepper

Rick Knepper

Lives in United States Fort Worth, TX, United States
Works as a Computer Consultant
Joined on Oct 8, 2003
About me:

I think of myself as a hiker/traveler first, photographer second. The initial idea behind taking up photography was to record the details of my travels/hiking that at my age so often fade from memory over time - at an alarmingly accelerated pace I am afraid. Hiking especially, allows me to visualize and understand my place in the natural world. It has been at times a spiritual experience. Hiking alone seeking solitude in remote areas has enhanced this experience. Maintaining this order of priority has been a bit of a struggle for several reasons. Being a bit of a gearhead, the activity of making images during a hike has its own appeal but can be disruptive to the meditative aspects of the experience. Viewing and studying well made images after the hike is long over has become a bit of a thing as I see detail in those images that I didn't see or notice with my own eyes while I was actually there which can prolong the experience after it is over or threaten to change the goal of the experience. I use the best camera equipment I can afford in order to record these places with as much clarity and preservation of interesting detail as possible. I primarily compose images in a way that documents a scene as I am viewing it at the time but of course I also allow myself the freedom to compose in ways that I feel are interesting beyond simple documentation. What I like about photography as a pursuit of pleasure is that I can compose freely and that I am not confined to composing for what may be commercially attractive to a tourist in a gift shop. I am committed to improving my skills and talent as a photographer so that my actions do not counteract the clarity and resolution of imaging this fine equipment provides. By the way, turning professional isn't an option. At my age, I am seeking to retire, not begin another career.

EOS 5D mkIII
EOS 6D
Nikon D800E
Nikon D3x
TS-E 17mm f4L
EF 40mm f/2.8 STM
EF 100mm f2.8L Macro IS
AF-S NIKKOR 14-24mm f/2.8G ED
AF-S Nikkor 24-70mm f/2.8G ED
EF 24-70mm f2.8L II
EF 70-200mm f4L IS
Tamron SP 150-600mm F/5-6.3 Di VC USD
Carl Zeiss Distagon T* 18mm f3.5 ZF
Contax Zeiss Distagon T* 21mm f2.8
Leica Elmarit-R 28mm f/2.8 (E55)
Carl Zeiss Distagon T* 25mm f2.8 ZF
Carl Zeiss Distagon T* 28mm f2 ZF
Carl Zeiss Distagon T* 35mm f2 ZF
Carl Zeiss Makro-Planar T* 50mm f2 ZF
Canon 1.4x Teleconverter
Kenko 2x Pro 300 DGX Teleconverter
550EX Flash
EF 18-55mm kit lens (shelved)
EF 24mm f1.4L II (sold)
EF 35mm f1.4L (sold)
EF 16-35mm f2.8L II (sold)
EF 24-105mm f4L IS (Sold)
EF 50mm f1.2L (Sold)
EF 85mm f1.2L II (Sold)
EF 135mm f2L (sold)
EF 200mm f2.8L II (Sold)
EF 16-35mm f/2.8L (sold)
EF 24-70mm f/2.8L (sold)
EF 70-200mm f/2.8L IS (sold)
Canon 2x Teleconverter (sold)
Sigma 14mm f/2.8 (returned)
Olympus Zuiko 21mm f2 (returned)
Carl Zeiss 25mm ZF (returned)
EF 24mm f1.4L (returned)
EF 50mm f1.2L (2 returned)
Olympus H.Zuiko OM 24mm f2.8 (returned)
Nikon 14-24G (returned)
Nikon D700 (returned)
EOS 5D (Sold)
EF 100mm f2.8 Macro (Sold)
EF 17-40mm f4L (Sold)
EF 24-70mm f2.8L (Sold)
EF 70-300mm f4-5.6 IS (Sold)
Olympus OM 24mm f2 Zuiko MC (Sold)
Leica Elmarit-R 35mm f2.8 (E55) (Sold)
TS-E 24mm f3.5L (Sold)
Contax Zeiss Planar T* 50mm f1.7 (Sold)
Contax Carl Zeiss Distagon T* 28mm f2.8 (Sold)
Contax Zeiss Vario-Sonnar T* 35-70mm f3.4 (Sold)
EOS 5D mkII (Sold)
EOS 5D mkII backup (Sold)
EF 70-300 f/4-5.6L IS USM (Returned)

Comments

Total: 176, showing: 1 – 20
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On New samples from the Sigma 24mm F1.4 DG HSM Art lens article (213 comments in total)
In reply to:

Horshack: Samples looking good. Here's a sharpened version of the f/2.8 landscape shot:

http://horshack.smugmug.com/photos/i-ZcDgZGh/0/O/i-ZcDgZGh.jpg

Looks good to me. No need to fear diffraction from using a lens that required stopping down to f11 or worse simply to bring the corners into focus.

Direct link | Posted on Feb 20, 2015 at 23:34 UTC
On New samples from the Sigma 24mm F1.4 DG HSM Art lens article (213 comments in total)
In reply to:

jpino79: Just a general comment: I don't know why all the people are currently flashed by the outstandig sharpness of a Sigma ART lens? It is a bit of a hype now when i take a look at the photography forum world. And is sharpness everything what counts for a lens?

If i take a look at many pictures of a Nikon AF-S Nikkor 50mm f/1.8G at Flickr for example... to my perception of image quality they give me already satisfying results - the picture as a whole including the sharpness, colors, lighting and bokeh looks great. So i don't need and understand why a big, expensive and heavy Sigma Art f/1.4 lens does something better?

What is a big deal about the sharpness of any lens these days is the 'across the frame' sharpness at wide apertures. For example, I can shoot the same infinity scene with my 24-70 II at f5.6 that used to require f11 with many lenses, zoom and prime, from previous eras. Why do I want to avoid f11 when I do not need it for legit DoF purposes? Diffraction.

Direct link | Posted on Feb 20, 2015 at 13:40 UTC
On Sigma24mmF1.4_newer_samples-10-F4.0 photo in dpreview review samples's photo gallery (2 comments in total)

The left/right edge performance of this lens looks good as seen in other images. There's some fall-off into the corners at f2.8 and f4 slight enough that I suspect most folks will not mind. Personally, on scenes like this with a lens like this (capable of across the frame sharpness at wide apertures, my 24-70 II comes to mind)), I use f5.6 as a safety feature i.e. f5.6 will not summons visible diffraction effects at the image sizes I use (may change in the future to larger images) and is probably overkill for the DoF required in the corners of such scenes.

This image has a curious thing (the tree in the left bottom frame) I am not used to seeing although CA seems to be prevalent in many of these images. One branch has green CA and the other branch has purple CA. Is that fixable? I admit that I let ACR's lens profiles adjust the CA for me so I do not look for it nor manually correct for it as a matter of normal course.

Direct link | Posted on Feb 20, 2015 at 13:01 UTC as 1st comment | 1 reply
In reply to:

Lassoni: Why not carry single body of each system in a backpack or something? D610 + 6D + GM1 + E-M10 + NX30 .. or something?

Hi Rishi, here's what I carry onboard every flight.

http://www.dpreview.com/galleries/4217531195/photos/3144831/img_0347

:)

I've seen enough to be encouraged about the lens. Look forward to your comprehensive testing.

Direct link | Posted on Feb 18, 2015 at 02:56 UTC
On CP+ 2015: Sony shows off new technology article (216 comments in total)
In reply to:

Rick Knepper: Did anyone ask Sony about a possible A7r II?

Well, I am hoping that EFC and the A7r II will go hand in hand. Thanks for the reply.

Direct link | Posted on Feb 17, 2015 at 12:13 UTC
On CP+ 2015: Sony shows off new technology article (216 comments in total)

Did anyone ask Sony about a possible A7r II?

Direct link | Posted on Feb 17, 2015 at 11:04 UTC as 6th comment | 3 replies
On Sigma24mmF1.4_samples-13-F1.4 photo in dpreview review samples's photo gallery (4 comments in total)
In reply to:

Rick Knepper: Much better scene for edge/corner inspection. Thanks.

f1.4 still a bit disappointing at 100%, even 50% (especially if a crop is coming out of one of the corners). Jury is still out on full sizes images downsized to fill my NEC 26" monitor. I think there was something wrong with your metabones adapter for this series of images as there was light-colored vignetting in both lower corners that wasn't there before and there appears to be some decentering too - towards the top left.

As you allude to above, using the lens in its native mount may improve performance a lot.

Even if the adapter is misbehaving, by f5.6 the lens looks like it cleaned up its edge/corners pretty well regardless of image size.

Center frame @1.4 looks awesome as illustrated by the image of Rishi on the convention floor - don't know if that image was processed in or out of camera but looks great.

Obviously, you didn't understand my words. I am reserving final judgment until I see samples shot mounted directly to a Canon camera (or a Nikon camera). I have a zoom lens that either meets or beats these samples at f2.8. I was hoping this lens would be the first 24mm lens that legitimately could be considered sharp across the frame at f1.4. Again, I am going to reserve judgment until I see proper testing. If this lens ends up not being the lens I was hoping for, then I wait for the Zeiss Otus version while you can go ahead and buy the Sigma and continue to be stunned.

Direct link | Posted on Feb 14, 2015 at 02:54 UTC
On Sigma24mmF1.4_samples-13-F1.4 photo in dpreview review samples's photo gallery (4 comments in total)

Much better scene for edge/corner inspection. Thanks.

f1.4 still a bit disappointing at 100%, even 50% (especially if a crop is coming out of one of the corners). Jury is still out on full sizes images downsized to fill my NEC 26" monitor. I think there was something wrong with your metabones adapter for this series of images as there was light-colored vignetting in both lower corners that wasn't there before and there appears to be some decentering too - towards the top left.

As you allude to above, using the lens in its native mount may improve performance a lot.

Even if the adapter is misbehaving, by f5.6 the lens looks like it cleaned up its edge/corners pretty well regardless of image size.

Center frame @1.4 looks awesome as illustrated by the image of Rishi on the convention floor - don't know if that image was processed in or out of camera but looks great.

Direct link | Posted on Feb 13, 2015 at 10:48 UTC as 2nd comment | 2 replies
On Sigma24mmF1.4_samples-14-F2.0 photo in dpreview review samples's photo gallery (1 comment in total)

Seems to be a trend here that the left edge/corners seem blurrier than the right side alluding to either a decentering issue or a problem with the adapter. May I suggest a tripod and perform the same series (with a Canon camera) but level all axis. Should be able to get the ceiling/infinity into such shots @24mm and reduce distractions like perspective distortion from radically tilting the lens.

Direct link | Posted on Feb 12, 2015 at 12:56 UTC as 1st comment
On Sigma24mmF1.4_samples-13-F1.4 photo in dpreview review samples's photo gallery (3 comments in total)

Across the frame performance @f1.4 appears disappointing but will reserve final judgment until a better testing protocol is used and the lens can be mounted level on all axis. Ya'll might want to carry Canon, Nikon and Sony cameras with you to big shows like this so you don't introduce doubt by using adapters.

Direct link | Posted on Feb 12, 2015 at 12:49 UTC as 2nd comment
On Sigma goes wide with 24mm F1.4 DG HSM Art lens article (184 comments in total)

Pre-ordered.

Direct link | Posted on Feb 12, 2015 at 00:40 UTC as 2nd comment
On Canon EOS 5DS / SR First Impressions Review preview (2267 comments in total)
In reply to:

Rick Knepper: It was improved, relatively speaking. A sensor with twice the pixels has the same DR as the 5D3 = improved.

Sorry the actual quote from the video interview:

... basically equivalent to the 5D3 in traditional measuring terms ...

...there is a much lower noise floor...

... more ability to pull out detail in shadows and in highlights ...

Direct link | Posted on Feb 8, 2015 at 04:57 UTC
On Canon EOS 5DS / SR First Impressions Review preview (2267 comments in total)
In reply to:

Shiranai: Meanwhile at the Canon headquarters:

Manager 1: We rule the camera market.
Manager 2: We rule the world.
Manager 3: But we don't rule medium format...

Moment of silence, chirping.

Manager 1: Doesn't mind, release a new 5D, squish 50 MP on the sensor, but cripple something so it doesn't compromise 1DX or 5DM3 sales.
Manager 3: Video mode, like we always do?
Manager 1: Good, but thats not enough. Do something with the ISO!
Manager 3: Perfect, we are so naughty.
Manager 2: Oh yeah, and the others did that aliasing filter thingie last year.
Manager 1: Ok I have a great idea, let's release two 5D models one WITH the aliasing filter and one without, that'll teach them a lesson. Also, put a medium format price tag on them so they know we are serious.
Manager 3: But they aren't...
Manager 1: Shut up, and make it so. We are Canon, it's not supposed to make sense. The main point is, we release something new.

Evil laughter while picture zooms outside of the headquarter.

Well, there goes your perfect record.

There are millions who think Adam Sandler is funny while I think most of us can agree that he is no Richard Prior.

The similarity between you and Bill Maher, Jon Stewart and Stephen Colbert? Your audiences are drinking the same Kool-aid.

Direct link | Posted on Feb 7, 2015 at 15:07 UTC
On Canon EOS 5DS / SR First Impressions Review preview (2267 comments in total)

It was improved, relatively speaking. A sensor with twice the pixels has the same DR as the 5D3 = improved.

Direct link | Posted on Feb 7, 2015 at 13:52 UTC as 237th comment | 4 replies
On Canon EOS 5DS / SR First Impressions Review preview (2267 comments in total)
In reply to:

Shiranai: Meanwhile at the Canon headquarters:

Manager 1: We rule the camera market.
Manager 2: We rule the world.
Manager 3: But we don't rule medium format...

Moment of silence, chirping.

Manager 1: Doesn't mind, release a new 5D, squish 50 MP on the sensor, but cripple something so it doesn't compromise 1DX or 5DM3 sales.
Manager 3: Video mode, like we always do?
Manager 1: Good, but thats not enough. Do something with the ISO!
Manager 3: Perfect, we are so naughty.
Manager 2: Oh yeah, and the others did that aliasing filter thingie last year.
Manager 1: Ok I have a great idea, let's release two 5D models one WITH the aliasing filter and one without, that'll teach them a lesson. Also, put a medium format price tag on them so they know we are serious.
Manager 3: But they aren't...
Manager 1: Shut up, and make it so. We are Canon, it's not supposed to make sense. The main point is, we release something new.

Evil laughter while picture zooms outside of the headquarter.

Here's a link to some comedy schools you might investigate before posting something this unfunny and derivative again:

http://www.pastemagazine.com/blogs/lists/2013/11/8-great-comedy-school-from-around-the-nation.html

Direct link | Posted on Feb 7, 2015 at 13:47 UTC
On Canon EOS 5DS / SR First Impressions Review preview (2267 comments in total)

Better use of the phrase Nifty Fifty

Direct link | Posted on Feb 6, 2015 at 18:59 UTC as 318th comment
On DSC01118 photo in dpreview review samples's photo gallery (9 comments in total)
In reply to:

Rick Knepper: At 16mm, f11, calculating the distance from the sensor plane to the corners, and the 16-35 being a relatively new lens, I would expect less softness in the corners than these images exhibit. Zeiss (or Sony directing Zeiss) continues to disappoint with the UWA & WA zooms for this system.

As for the comment about fill flash and what-nots, this is a Sony sensor so there is no need for those old-fashioned solutions for back-lit scenes. The shadow on the guy should be a cinch to lift. :)

First off, did you see the :)? The emoticon wasn't converted to a graphic as it is in the forums but it is still has the same meaning. I was being ironic.

But, now you are going to force me to disagree with you. PPing like developing was for Ansel Adams is a necessary activity for bringing out all of the detail and tone a photograph has to offer. You will not achieve this straight out of a camera but then, some work does not require as much care.

In the case of the image we are talking about, yes fill flash would have been nice but then, does this camera even have a flash?

Direct link | Posted on Jan 20, 2015 at 12:38 UTC
On DSC01118 photo in dpreview review samples's photo gallery (9 comments in total)

At 16mm, f11, calculating the distance from the sensor plane to the corners, and the 16-35 being a relatively new lens, I would expect less softness in the corners than these images exhibit. Zeiss (or Sony directing Zeiss) continues to disappoint with the UWA & WA zooms for this system.

As for the comment about fill flash and what-nots, this is a Sony sensor so there is no need for those old-fashioned solutions for back-lit scenes. The shadow on the guy should be a cinch to lift. :)

Direct link | Posted on Jan 19, 2015 at 12:14 UTC as 2nd comment | 3 replies
On Opinion: The myth of the upgrade path article (1405 comments in total)
In reply to:

Rick Knepper: The struggle with this decision has generated years of mind-numbing posts regarding format equivalence. Hopefully, 'affordable' FF cameras will put those still in the throes of FFAS out of their misery once and for all. FF is a general purpose format. APS-C is either for the budget conscious or the reach-restricted (another way of saying budget conscious).

What are you babbling about Sessility? APS-C is a format that was primarily developed for budget-conscious customers, plain and simple. Still is. You may work in IT in some capacity but you do not seem educated. In my original post, I covered every scenario in which APS-C makes sense which by the way also includes all of those little people you say you know. There is nothing stopping folks from adopting APS-C for whatever purpose but some of these people will probably dump those cameras and buy FF. Do you know what a false argument is? Your post is one big one.

Direct link | Posted on Jan 13, 2015 at 11:16 UTC
On Opinion: The myth of the upgrade path article (1405 comments in total)
In reply to:

Rick Knepper: The struggle with this decision has generated years of mind-numbing posts regarding format equivalence. Hopefully, 'affordable' FF cameras will put those still in the throes of FFAS out of their misery once and for all. FF is a general purpose format. APS-C is either for the budget conscious or the reach-restricted (another way of saying budget conscious).

It makes no sense to you because you have poor reading comprehension and/or lack of knowledge of the gear. A professional can and will adopt an APS-C system for exactly the reasons I mention above. A professional using a particular camera has nothing to do with anything.

Direct link | Posted on Jan 9, 2015 at 11:46 UTC
Total: 176, showing: 1 – 20
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