d2f

Lives in United States United States
Joined on Mar 25, 2005

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Total: 59, showing: 1 – 20
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On article The whole nine yards: Canon 35mm F1.4L II USM review (336 comments in total)

IMHO this review is well written. One side effect may result in a decreased the resale value of the previous Canon 35mm F1.4L lens. The side by side comparison of the two Canon lenses provides more than enough motivation to upgrade from the version one lens to either the Sigma Art lens or Canon version 2 lens. Given the higher cost of the version 2 the Sigma Art lens appears to be better value and choice for myself.

Link | Posted on Mar 12, 2017 at 16:39 UTC as 4th comment
On article The whole nine yards: Canon 35mm F1.4L II USM review (336 comments in total)

Regarding page 4, background blur: Something odd about the Canon 35mm F1.4L images at F5.6, F8 and F11. The F11 image appears to have a step up in contrast that may be due to the F8 image being slightly out of focus. Also the Sigma appears to have a slightly narrow angle of view compared to the Canon F1.4L II lens.

Link | Posted on Mar 12, 2017 at 16:31 UTC as 5th comment

regarding page 4: "In terms of AF performance the Sony 85mm GM is generally slower to lock focus when comparing it to the Sigma 85mm mounted on a native Canon body (5DSR and 5D Mark IV), particularly while in live-view, using dual-pixel AF on the 5D Mark IV. " Is the focusing speed and low light attributes of the lenses being compared a function of the camera body in combination with the lens? If so then what was the point of comparison statement? What was the focusing speed comparison of the two lenses on the Sony body, with either of the lens adapters used on the Sigma lens?

Link | Posted on Mar 12, 2017 at 16:12 UTC as 16th comment

Regarding page 4 results using the Sony camera body. Did the test include images with and without camera lens correction? The reason I ask is Sony may have provided some image processing corrections that may or may not be available to the Sigma images, that could effect the side by side evaluation.

Link | Posted on Mar 12, 2017 at 16:07 UTC as 17th comment

From page 3: "the Sigma is adapted to the Sony a7R II via a Metabones smart lens adapter in order to compare it directly to the Sony 85mm GM", can we assume that the Sigma MC-11 adapter was unavailable for this test? The reason I ask is this is a selling point of the Sigma lens system to Sony mirrorless users like myself. That and as the review noted adapters can effect the image quality.

Link | Posted on Mar 12, 2017 at 16:00 UTC as 18th comment

My DP review "side by side" wish list includes the DXO rating, average focusing speed (min max distance performed tens times then averaged) and focusing noise (detectable in video recording "yes" or "no" in a quite environment) attributes. In the photograph samples a night shot of the stars (wide open) with emphasis on stars in the four corners of the frame (coma). Thank you.

Link | Posted on Mar 12, 2017 at 15:51 UTC as 19th comment
On article Sigma 85mm F1.4 Art DxO results: a new king is crowned (249 comments in total)

Speaking only for myself, I am glad that we have DXO running all these tests, so we can compare one lens to another on a somewhat equal playing field. Yet in the end it is not the lens that makes or breaks the image but the person using it & the camera. With modern optics being what they are, there are no more excuses for people to not create prize winning, money making, images consistently day after day. The true limitation is themselves. Stop trying to convince others that your gear is better than theirs or the latest and greatest lens released. Who cares. Everyone, over time, finds what works for them and creates the images they want and that is all that is important at the end of the day.

Link | Posted on Feb 3, 2017 at 05:22 UTC as 28th comment | 1 reply
On article Happy Holidays from DPReview (150 comments in total)

Merry Christmas and Happy New Year to you as well.

Link | Posted on Dec 27, 2016 at 16:13 UTC as 27th comment
On article Woof! Sony a6500 sample images are here (364 comments in total)

Thank you for sharing the photographs. I wonder in the two days of shooting what was the percentage "lost" shots i.e. improperly focused? Were there any common denominators such as low light, rapidly moving subject away or towards the camera? Did certain Sony lenses focus "better" than the others? Hopefully the answers will be part of the final write up on the camera. Also thank you to Sony for supporting another product demo event for the folks who evaluate cameras.

Don

Link | Posted on Nov 19, 2016 at 16:08 UTC as 20th comment | 3 replies

Interesting reading. But kind of makes one wonder about the Apple management trade off reasoning; for example on the one hand they remove the mini head phone jack from their iPhone but retain it on their latest Pro laptop. While they removed the SD reader because the SD card stuck out, but have no problem selling the customer an expensive adapter that sticks out even further. The statement that they were surprised by the level of criticism shows a "Let them eat cake" level of corporate arrogance. While loyal die hard Apple customers will continue to defend Apple management choices (i.e. can do no wrong) and buy the latest and greatest laptop, others may elect to look elsewhere as the Apple magic dust finally wears off.

Link | Posted on Nov 7, 2016 at 03:34 UTC as 45th comment | 1 reply

Apple engineering is innovative but their management team has always been short sighted and out of touch with their loyal customers. Apple should have included the HDMI and SD adapters with the laptop, since Apple management omitted the interfaces. Now reality is biting them once again as they in damage control mode to regain sales and prevent stock prices from dropping further. With hundreds of billions in cash reserve Apple can only recover lost "good will" by providing two interface adapters of the customer's choice with the laptop at no additional cost.

Link | Posted on Nov 7, 2016 at 03:03 UTC as 42nd comment | 2 replies
On photo DSC02542 in d2f's photo gallery (1 comment in total)

macro lens setup

Link | Posted on Oct 14, 2016 at 06:30 UTC as 1st comment

If Sony produced a camera that met everyone's expectations I suspect some folks would stop taking pictures since all their excuses for not taking perfect photographs would be gone. It is a wonder that the greats of the analog days were able to produce wonderful images with such constancy using primitive tools. Kinda of makes me wonder why with all the technical advancements in the camera gear why the number of great photographers has not increase seven fold. Could the problem be not what is in photographer's hands but what is behind the camera? If that is the case then no camera system will ever solve the problem since if we reach that point it will be the camera that is creating the image and not the photographer.

Link | Posted on Oct 7, 2016 at 15:16 UTC as 25th comment | 1 reply

Thank you for posting your article on Canon's mirrorless product line development. Chances are Canon monitors DP website and has read the commentary, taking it to heart. Why I think this is the case is camera companies are moved by the sales figures and DP can influence sales. Canon has many new innovative technologies in the works along with the other camera companies. All we have to do as photography product consumers is vote with our wallet. Like we did buying smartphones with ever their improving camera attributes that choked off low end camera sales. Cheers.

Link | Posted on Sep 18, 2016 at 14:51 UTC as 287th comment

The reasoning is faulty given that any attacker is free to walk the streets and gather human intelligence. If they fear another country like China then Google street maps will not make a difference given that China has informants with camera phones and recon satellites that have already mapped all areas of interest to at least three foot resolution. If China were to attack India they would take out the government and military within seven days not attack the millions of people at the street level. India would in the end respond with nuclear weapons and that is what everybody should fear.

Link | Posted on Jun 17, 2016 at 14:54 UTC as 2nd comment | 2 replies

My copy arrived yesterday and I have taken a few images with the lens mounted to a a7s and most of the previous posted observations are correct. The out of focus areas with out of focus highlights do exhibit football shaped artifacts. This is not out of the ordinary for most lenses of this type. Contrast and sharpness appears to be low at wide open. Color fringing is present but is correctable in post. Later, I will run a comparison to a Canon FD 50mm 1.2 with a Vizelex FD-Nex ND throttle on a a6300. Mechanically the 85mm 1.2 lens has a well dampened aperture ring, but the focusing ring has some minor "metal scrubbing" issues.

Link | Posted on Jun 4, 2016 at 15:08 UTC as 1st comment
On article Pentax K-1 Pixel Shift Resolution: Updated Field Test (211 comments in total)

In the last sample image in the far left hand side, the flag appears to have challenged the image processing a bit.

Link | Posted on Jun 4, 2016 at 14:54 UTC as 34th comment
On article Polaroid-branded BrightSaber Pro wand packs 298 LEDs (41 comments in total)

Great idea it kind of reminds me of my battery powered hand held LED shop lights that I got from Sears.

Link | Posted on Mar 13, 2016 at 18:27 UTC as 1st comment

In some ways it reminds me of my Pentax 67.

Link | Posted on Oct 25, 2015 at 03:25 UTC as 59th comment | 1 reply
On article Ricoh teases spring 2016 full-frame Pentax DSLR debut (520 comments in total)

Here is my wishlist:
Programmable navigation menu and at least 3 custom control buttons.
No video.
Back lighted controls.
Daylight viewable OLED touch screen that can turn towards the front.
4 stop camera body image stabilization that adapts to the lens mounted.
Intelligent metering with face recognition and accurate white balancing.
Interchangeable focusing screens to facilitate manual focusing.
WiFi and wireless remote control using smartphone.
600 exposure battery.
Dual SD slots.
Dual finder, electronic & optical, the best of both worlds.
Weather sealed.
Low vibration/noise shutter with long life.
Hyperfocal focus position default when auto focus cannot acquire subject when shutter is released.
Threaded PC connector and hot shoe.
Loss less Raw and other raw storage options.
New type of sensor technology that renders current sensor technology obsolete.
Lightweight and small.
Comfortable hand grip with shutter release located on it.
Through the lens IR focus assist.
Len micro adjust.

Link | Posted on Sep 18, 2015 at 23:44 UTC as 107th comment | 5 replies
Total: 59, showing: 1 – 20
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