acidic

Lives in United States San Francisco, CA, United States
Joined on Nov 23, 2003

Comments

Total: 335, showing: 21 – 40
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In reply to:

armandino: Such a lens... on a 40D?????????

You should buy it, adapt it for use on a Sony A7R2, and the sell it in a decade, so others can say "Such a lens... on a A7R2?????????"

Link | Posted on Jun 19, 2016 at 23:07 UTC
In reply to:

MrTaikitso: Professionally done, but visual evidence of why cities are not fit for human occupation. No green spaces or wide walking streets, just the odd tree - unlike cities built hundreds of years ago. So you live on level 50 of a glass tower. No garden to tend, park for the kids to run about in playing football. We appear to be creating a world that will be aesthetically interesting in a video game (and to blow up, such as in Battlefield 4), but that is detrimental to our QOL. (Quality Of Life.)

Anyway, this is a photography forum, so I will get off my high tower and be gone. ;)

Good city planning can fix the issues you speak of. A well planned city is densely populated (especially near transit hubs), with lots of green space scattered throughout. And it's very walkable and transit friendly. Try going to Vancouver, BC, Canada for a great example.

The alternative would be sprawl, resulting in poor public transit and increased carbon emissions.

Link | Posted on Jun 16, 2016 at 01:38 UTC
In reply to:

Bev81 from France: Very nice work, and fascinating city
But I'm glad I live in a house in a small town (only 3,000)
I'm a human, not an ant ! I'm not too positive concerning Human future

If all of humanity lived in densely populated urban centers, the environment would be in much better shape than it is now.

If all of humanity lived in small towns, you can say goodbye to lots of open space, and hello to more carbon emissions.,

Link | Posted on Jun 16, 2016 at 01:34 UTC
In reply to:

quangzizi: Hum let see:
http://www.dpreview.com/products/compare/side-by-side?products=canon_24_2p8_is&products=nikon_24_1p8g_ed&products=panasonic_12_1p4

Canon 24 2.8: 7 bladed - 11 elements in 9 groups - No sealing - Plastic construction - Heck, even the 24 1.4 only have 8 blades - 13 elements in 10 groups

Nikon 24 1.8: 7 bladed - 12 elements in 9 groups - No sealing - Plastic construction

Nikon 24 2.8: 1990s lenses - 7 bladed - 9 elements in 9 groups (no ED or any special element, questionable coating compared to modern lense) - No sealing - Plastic construction

Panasonic 12: 9 bladed - 15 elements in 12 groups - Weather sealing - All metal construction

Ah let me throw this in as well. Panasonic gives you a metal hood.

Any objection here?

tko,
How about the weights of a FF body and a m43 body? And while your at it, include another couple of FF lenses and m43 lenses and add them all up.

Link | Posted on Jun 16, 2016 at 01:30 UTC
In reply to:

Lassoni: This is the most useless lens for m43, right after olympus macro 30 3.5 or whatever the new lens is.

Why? Because it creates huge disharmony. This lens has nothing to do with a m43, it's just too big. I can understand 42.5 f1.2 , because it's a portrait lens, there's actual need for wide aperture lenses for portraiture.. but I seriously don't see the need in wider-than-1.8 12mm lens.

You know what would make lots of more sense? A 90 or 100mm macro lens for some insect macro, or a 12mm T-S lens or something. If they want make 12mm prime, they could've kept it 1.8 or 2 , keep it smaller and lighter than Nikon 24 1.8 .. why would you want a FF size prime lens on a m43 ??? Might as well get a Sony a7 at that point imo

"Might as well get a Sony a7 at that point imo"

Sure, if you are going to have a one lens arsenal. But if you are going to have many lenses, m43 still makes sense from a portability standpoint, even if one wide, fast lens happens to be huge.

Link | Posted on Jun 16, 2016 at 01:26 UTC
On article Video: Canon EOS 7D versus leaf-cutter ants (47 comments in total)
In reply to:

James Benet: The reason they took the plastic and the other bits is because you left a sweat or smell imprint on it. The ants do not eat the leafs or insects they take. They hoard it deep into their nests and let it rot to grow a fungus that is their true food source. The plastic and other parts by having bacteria and human oils and sweat would also help in growing the fungus. As a nature photographer myself the water containers help but are just a starting defense. You need to use White Petrolatum or Vaseline in the tripod legs to stave them off as that is something they easily stick to and thwarts their advance.

I would assume that if enough ants get stuck on the petrolatum, it will allow others to walk over them in order to get to anything else unprotected (e.g. the camera). Ants are social and altruistic, and self-sacrifice for the good of the colony.

Link | Posted on Jun 9, 2016 at 09:28 UTC
On article Looking Sharp: A focus stacking tutorial (222 comments in total)

Just use TS-E lenses. Faster, easier, immune to wind.

Link | Posted on May 29, 2016 at 23:25 UTC as 47th comment | 7 replies

Technology for lItterbugs.

Link | Posted on May 24, 2016 at 01:30 UTC as 26th comment

This has the potential of making my Instagram account interesting.

Link | Posted on May 22, 2016 at 20:21 UTC as 26th comment
In reply to:

Spectro: LED is a nice addition for any macro. But the 28mm even with the 1.6x factor is just too close. You need a tad longer for insect or live creatures. A short length can be use for static macro which you can control with your own DIY lighting. I guess it will be good for macro flower shots outdoor.

A longer lens with a larger working distance will require more powerful LEDs.

if you double the working distance, you will need to increase output by 4x.

Link | Posted on May 15, 2016 at 22:52 UTC

"Two curved flash units surround the front element of the lens, with the ability to illuminate both simultaneously, or one at a time. Users are also able to adjust the brightness of the Macro Lites between “bright” and “dim” settings."

This doesn't really specify, but can bright and dim settings be applied to each LED independently? Or do you have to choose between bright or dim for both, with the option of independently turning each on and off?

There are at least 7 possible configurations for the LEDs, and possibly up to 9. Yet there appears to only be one "light" button. Anyone know how that's supposed to work?

Link | Posted on May 13, 2016 at 01:43 UTC as 3rd comment

1.2x macro on a 1.6x APS-C body will yield almost 2x equivalent magnification in 35mm terms. Now if only I can figure out what the equivalent aperture would be.

Link | Posted on May 13, 2016 at 01:36 UTC as 4th comment | 1 reply

Canon has found that adding LEDs to lenses is easier than improving the dynamic range of their sensors.

Link | Posted on May 12, 2016 at 01:29 UTC as 11th comment | 3 replies
In reply to:

Jonathan F/2: Seriously, I think we can stop buying the latest and greatest. I can barely tell the difference between all these modern cameras! They all look good. Sensor tech has plateaued!

"Sensor tech has plateaued!"

Only if you are satisfied with a 5 stop exposure correction in post. I am not so complacent. I am waiting for a sensor so good that I can correct an image that I took with the lens cap still on.

Link | Posted on May 8, 2016 at 22:49 UTC
In reply to:

Dester Wallaboo: Judge a photographer by their portfolio and skill.... not by their gear. Next.

"Yes it would be nice to see more portfolio's from the experts in here so we can judge their skills as photographers."

But only if they list what gear they used to take their photos, so we can give credit where credit is due (i.e. the holy sensor).

Link | Posted on May 8, 2016 at 22:47 UTC
In reply to:

emfor: What are the most exciting features to test when a 1D X II makes its way through my door?
Right! AF performance, framerate, speed, handling, reliability, 4k video, 120fps 1080p, ... Do I get every shot? What is the hit rate? And much more ...

So I'm very excited after DPR tests this new monster.
But hey, what is that? Studio tests? Exposure Latitude? ISO Invariance?
|-O

"What are the most exciting features to test when a 1D X II makes its way through my door?"

If you are DPReview, you would test the features that give you an opportunity to tell the world how great Sony is.

Link | Posted on May 8, 2016 at 22:40 UTC

Can't wait to see how many pros shoot with Sonys at the Olympics this year.

Link | Posted on May 8, 2016 at 22:37 UTC as 14th comment | 1 reply
In reply to:

jackgreen: Sensor still lagging behind A7R2

That's okay, the primary target market for the 1Dx2 probably doesn't care how it fares against the A7R2.

Link | Posted on May 8, 2016 at 22:30 UTC
In reply to:

Gesture: Good article.

Gear in this story. Why not post links to Photoshop and computers?

"All the really good photos are hard to get to."

Sounds like an excuse. Lots of great and interesting photos are at your doorstep.

Link | Posted on May 8, 2016 at 21:48 UTC

Too blue for my taste. I would've boosted the color temp on the foreground. Back in the film days, I would be happy with this color balance for this high altitude+shade photo with daylight chrome film+warming filters. But with digital's flexibility, I think I would prefer a more neutral color balance, while still conveying cool tones. In my opinion.

Additionally, as someone who has used this type of post processing for images used in the greeting cards/postcards, I generally never felt it translated well to the types images intended to be printed to larger formats. For the image shown in this example, I prefer 'No Orton applied.' Again, just my opinion.

Link | Posted on May 8, 2016 at 21:45 UTC as 57th comment | 1 reply
Total: 335, showing: 21 – 40
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