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Messages - Ellen Schmidtee

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271
Third Party Manufacturers / Re: A Small Sigma 180 f/2.8 OS Macro Issue
« on: August 12, 2012, 10:19:26 AM »
There was a similar problem with Tamron lenses over a year ago - Canon apparently limited the functionality of focus points for some of it's lenses, and Tamron lenses which used the same IDs were hurt as well.

The more lens-specific-processing Canon adds to it's cameras, the more this kind of problems will occur, giving Canon bad rep as the brand that does not play well with others.

IMHO, the best solution for Canon would be to set aside a block of IDs for lenses by companies that reversed engineer the mount protocols, and not doing any lens specific processing for lenses that use an ID in that block.

272
Third Party Manufacturers / Re: A Small Sigma 180 f/2.8 OS Macro Issue
« on: August 12, 2012, 03:54:49 AM »
Whilst the issue of making a lens mount open or closed is an interesting argument, the fact of the matter is that you know full well that the EF mount is currently a closed system.  On that basis, it is not fair to bang one's fists on the table and demand a solution to a problem caused by a competitor's unauthorised reverse engineering of Canon's product.

Reverse engineering when done properly is 100% legal and does not need to be "authorised".

I'm not a lawyer or U.S. citizen, so I might very well be missing something, but doesn't the DMCA put some limits on reverse engineering?


As Sigma completes Canon's line of lenses, IMHO, Canon would benefit from having their cameras avoid such SNAFUs. Examples would be fisheyes - until the 8-15mm, Canon made only a diagonal fisheye for FF, and Sigma made circular fisheyes for APS-C & FF + diagonal for APS-C.

273
Third Party Manufacturers / Re: A Small Sigma 180 f/2.8 OS Macro Issue
« on: August 11, 2012, 10:29:06 AM »
If Canon makes a good lens, it will sell. If the competitor is better, Canon needs to "protect their market".

That would stifle competition, which is bad for consumers. Canon should compete by making a better lens.

That's beside the fact that the above statement simplifies things, e.g. there's a competition on price/performance.

274
Third Party Manufacturers / Re: A Small Sigma 180 f/2.8 OS Macro Issue
« on: August 11, 2012, 06:03:42 AM »
This is a (more or less) funny example of our believing in data correction algorithms etc.
I see a tendency to suspend development for better lenses in terms of vignetting, chromatic aberrations, distortions because you can correct them easily AFTERWARDS.

I'd rather easily correct in post processing than face the sticker shock accompanying those new lenses.

275
Lenses / Re: Sigma 30mm f/1.4 or Canon 35mm f/2?
« on: August 09, 2012, 02:35:28 AM »
My only issue with the 35mm f/2 is that it's bokeh is not so good in the presence of linear objects in the background. There's an example in the photozone review of the lens.

276
EOS Bodies / Re: Canon to announce medium format dslr?
« on: August 06, 2012, 01:21:48 PM »
I see lots of people hypothesizing and / or wishing for medium format mirrorless with an EF mount.

Frankly, I really, really don't see that happening.

At absolute most, it'll be like the EOS M, where you can use an adapter to mount EF lenses.

<snip>

No, medium format, mirrorless or otherwise, will come with a new mount and new lenses. It simply has to; physics (geometry!) demands as much -- which is exactly why it ain't gonna happen.

I think it's the other way around - EOS M proved that the mount is the electronics, and no more.

Therefore, if Canon makes medium format cameras, why not do the same? Keep the contacts, keep the protocols, increase the flange distance for the MF camera, and allow the MF lenses to be mounted on FF  / APS-C / EOS M cameras via an adapter that compensates for the smaller-sensor-body's shorter flange distance.

277
Am I the only person here that finds it incredible that a LENS has a firmware update!?  I thought they were just a bunch of glass in a tube, but I guess there is more to it than "meets the eye"... 

There must be some electronics there to communicate with the camera and activate USM & IS.

278
How would one update the firmware on those lenses? Via an on-lens USB port?

279
Lenses / Re: New Tilt-Shifts in 2013? [CR1]
« on: August 02, 2012, 08:12:20 AM »
I wish canon would make a lens foot for the TS lenses, so it would be easier to make perfect panoramas, when the lens would stay in exactly the same place and only the camera would be moved.

Canon doesn't, but Hartblei does (not cheap, though - but then, Canon's wouldn't be, either...).

425 EUR + S&H? Shish!

280
5D MK III Sample Images / Re: Flash in animal eyes
« on: July 31, 2012, 03:48:30 AM »
I was surprised by this strong reflection since the flash was behind and side to the rabbit's eye.

Cats have a night vision aid in the form of - for the lack of a better word - bio-mirror behind their retina, which doubles the amount of light reaching the retina. The light bouncing back causes the cat's eye to glow in the dark.

Possibly, rabbits have the same night vision aid, causing their eyes to glow.

As the glow looks red, maybe the does bounce off blood vessels behind the retina, and the eyes glow because of larger pupil - my impression is the whole eye glows.

281
EOS Bodies / Re: A New 100-400 & Coming Announcements [CR2]
« on: July 25, 2012, 11:07:45 AM »
Three more DSLR announcements?

Too early for the 1200D, but then again - Canon takes so long to deliver, an announcement on Photokina might have the body delivered just when expected anyway, that is Q4 of 2013. Two other might be the 7Dm2 & new 70D.

A bunch of new lenses are coming down the pipeline from Canon? If a competitively priced 14-24mm f/2.8 is not one of those, my next U.S.$X,XXX (money in saving account till next year) would be a Nikon body + Nikkor 14-24mm f/2.8.

My bet is a combination of EF-M lenses, and a combination of lenses that have at least 2 of 3 attributes: over-priced, under-speced, and late-to-deliver.

282
Lenses / Re: Keep 70-200 f4 IS or go for f2.8 IS II?
« on: July 21, 2012, 03:45:12 AM »
http://www.slrgear.com/reviews/showproduct.php/product/999/cat/11

http://www.slrgear.com/reviews/showproduct.php/product/57/cat/11

Check out SLR Gear reviews on these lenses.  Take a look at the Blur Charts that represent IQ.
Surprisingly the f4 lens has slightly better IQ, but with much less weight.  Unless you need f2.8... I wouldn't upgrade at all. 

Those links are to the f/2.8 IS USM mk 1, and the mk 2 should be optically superior to the mk 1.

Anyway, the f/4 IS USM is, from experience, an excellent lens. The extra size & weight of the f/2.8 IS USM mk II are noticeable by my muscle, as well as people around, including a few who just approached me and asked which TV station I'm working for.

A tripod gets a similar response. One time I shot a building next to occupy someplace, and one of the protesters just stood up in front of the camera and started preaching. Telling her I was sent there to shoot for a news segment about construction code violations made her leave so fast I didn't have to make up any more details.

283
When Canon has a gery fluid with high optical density (low transmission per mm thickness), they could even get rid of the iris. It would be great, when the apodisation effect works with every f-stop :-)

Wouldn't that take away from the ability to control the DoF?

284
Lenses / Re: New Canon 50mm Coming? [CR1]
« on: July 18, 2012, 04:54:07 AM »
For $849, I'd expect a 50 f/1.4 to either have Zeiss class build & IQ, or the abilities to make coffee and <self censored>

Actually the current on pretty much has zeiss class IQ, the basic zeiss 50mm 1.4 is the same old standard double gauss design

Actually, a certain photographer says that 50mm f/1.4 is Zeiss by name only.

That for sure is one hell of an amazing photographer to listen to  :D

My point is that the Zeiss 50mm f/1.4 is, according the reviews I've read, is not exactly one of Zeiss' best performing lenses.

285
Lenses / Re: New Canon 50mm Coming? [CR1]
« on: July 18, 2012, 02:21:11 AM »
For $849, I'd expect a 50 f/1.4 to either have Zeiss class build & IQ, or the abilities to make coffee and <self censored>

Actually the current on pretty much has zeiss class IQ, the basic zeiss 50mm 1.4 is the same old standard double gauss design

Actually, a certain photographer says that 50mm f/1.4 is Zeiss by name only.

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