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 which fade from memory over time. One never knows when the next visit to a National Park or other interesting location will be the last. Photography keeps these memories fresh. Hiking especially allows me to better understand my place in the natural world on a practical as well as spiritual basis. Hiking alone, seeking solitude in remote areas has enhanced this experience.

Maintaining this order of priority admittedly has become a bit of a struggle. Being a gearhead, the activity of making images during a hike has its own appeal but can be disruptive to the meditative aspects of the hiking/communing experience. However, viewing and studying well made images after the hike is long over allows me to see detail that I didn't see or notice with my own eyes while I was actually on location. It can also bring back spiritual thoughts I had while I was there without actually being there. I use the best camera equipment I can afford in order to record these places with as much clarity and preservation of detail as possible and to make studying the images a more pleasant experience.

I primarily compose images in a way that documents a scene as I am naturally viewing it at that time. 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 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 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
EFM 11-22mm f4-5.6 IS STM
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: 185, showing: 1 – 20
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Knowing how slow Lee Filters can be, it may be a year or more before the initial demand if not the initial shipment is fulfilled so expect huge wait times.

Direct link | Posted on Mar 28, 2015 at 02:12 UTC as 2nd comment
In reply to:

Robin Ducker: While this is an impressive performance I would be far more impressed if there were some near-field shots with objects taken at less than a metre and extended into 5-10 metres away. This is where a lens performance can really be judged because infinity focus is just one parameter.

Second, buyers of the 14-24 2.8 are attracted to the lens' build quality and durability so It would be good to have some sort of insight into how long the Tamron could perform. Not knocking - just acting like a real lens buyer.

The image above tells us about a lens' corner/edge performance. Shooting a scene that is corner to corner infinity is the same as shooting a flat wall. This removes DoF (other than the aberration) as a source of softness. Of course, there are many other tests necessary before making a final judgment on any lens. @15mm & f2.8, 5 meters is infinity.

Direct link | Posted on Mar 25, 2015 at 11:57 UTC
In reply to:

stevo23: I'm really disappointed in these samples - grainy, noisy, poorly focused. This has to be one of the most useless "real world sample" pages I've ever seen. Do these guys actually know how to use this camera? I make better images with a small sensor point and shoot.

Minute 34:30 View it and learn

http://www.dpreview.com/articles/1115167469/creativelive-gear-day-2015?utm_campaign=internal-link&utm_source=mainmenu&utm_medium=text&ref=mainmenu

Direct link | Posted on Mar 22, 2015 at 02:18 UTC
On 11598_IMG_2210-ACR final photo in Rick Knepper's photo gallery (2 comments in total)

Sorry for the delay in the response. I didn't get an alert that someone has commented. Yes, this was the 200/2.8L. It is a crop representing about 1/3 of the full image.

Direct link | Posted on Mar 17, 2015 at 12:12 UTC as 1st comment
On IMG_7259 photo in Rick Knepper's photo gallery (2 comments in total)

Thanks, although I have forgotten why I even uploaded this to DPR. This is Lake Tahoe.

Direct link | Posted on Mar 17, 2015 at 12:00 UTC as 1st comment
In reply to:

stevo23: I'm really disappointed in these samples - grainy, noisy, poorly focused. This has to be one of the most useless "real world sample" pages I've ever seen. Do these guys actually know how to use this camera? I make better images with a small sensor point and shoot.

" it's going to be a great lens" Then, you and I agree though I was able to see that from the samples Rishi posted.

Direct link | Posted on Mar 9, 2015 at 22:42 UTC
In reply to:

stevo23: I'm really disappointed in these samples - grainy, noisy, poorly focused. This has to be one of the most useless "real world sample" pages I've ever seen. Do these guys actually know how to use this camera? I make better images with a small sensor point and shoot.

To Stevo23, it is amazing to me that you have the audacity to turn this around and accuse me of being unpleasant. Here's your comments below. This isn't unpleasant? You are treating Rishi like he is a waiter that has displeased you.

"I'm really disappointed in these samples - grainy, noisy, poorly focused. This has to be one of the most useless "real world sample" pages I've ever seen. Do these guys actually know how to use this camera? I make better images with a small sensor point and shoot."

Direct link | Posted on Mar 8, 2015 at 10:39 UTC
In reply to:

stevo23: I'm really disappointed in these samples - grainy, noisy, poorly focused. This has to be one of the most useless "real world sample" pages I've ever seen. Do these guys actually know how to use this camera? I make better images with a small sensor point and shoot.

To JACS, the issues with the A7r camera are well documented and not worth continued trolling. Again, I could care less about the A7 II. This post is about a lens and if you can't extrapolate, then maybe a P&S would be yours & Stevo best bet anyway.

Direct link | Posted on Mar 7, 2015 at 17:52 UTC
In reply to:

stevo23: I'm really disappointed in these samples - grainy, noisy, poorly focused. This has to be one of the most useless "real world sample" pages I've ever seen. Do these guys actually know how to use this camera? I make better images with a small sensor point and shoot.

To Stevo23, you are showing your ignorance here. I see no objectionable noise for a 36 MP camera. I could care less what the A7 II does. In the scenes shot from the Amazon offices (I assume this since Group Health is on the next block) with the A7r, the f1.4 shot tells a great story. And in case you haven't gotten the memo yet, the new paradigm for modern lenses is sharp across the frame wide open. Canon got the memo and has at least, updated their zooms. Nikon hasn't yet. Plenty of photographers care about wide open performance. In the series from the Amazon office building, I noticed several images a bit softer than the others. I assumed this was from the infamous shutter shock issue that plagues the A7r.

Direct link | Posted on Mar 7, 2015 at 12:47 UTC
On New samples from the Sigma 24mm F1.4 DG HSM Art lens article (235 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 (235 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
Total: 185, showing: 1 – 20
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