April 20, 2014, 08:18:45 PM

Show Posts

This section allows you to view all posts made by this member. Note that you can only see posts made in areas you currently have access to.


Messages - Aglet

Pages: 1 ... 30 31 [32] 33 34 ... 55
466
Lenses / Re: Bokeh confusion.
« on: December 28, 2012, 01:53:43 PM »
Aglet: I would struggle if I did not use that lens... I find that it has a very useful focal length range..
But yeah the bokeh going by what we see here does seem weird. It is almost as if the camera was rotating on its axis as the shutter was pressed.

I hear ya.  I'd love it if I could just use this lens and not be concerned about ugly bokeh showing up.
but it does, so be aware of the weaknesses of whatever gear you're using.
Just because it cost a lot and came with an "L" in the moniker does not mean it's perfect.

It's a lens with compromises, as most are, unfortunately.
My new Nikon 70-200 f/4 VR shows some of the same effect.  I knew this before I bought it as I could see the radial blur effect in a sample image someone posted from an early production sample.  The shot was of grass, at a shallow angle, so you could see the blur quality around the central focus area.  In the full size shot it was hard to notice the radial blur but in the small thumbnail size image it was grossly obvious.

What I've seen from modern zooms is more of this radial bokeh tendency.  I'm no lens designer but I think this is the price we pay for zooms that are super sharp with well controlled CA.  Subjects in the focus zone are rendered very accurately but those just in front and behind get some strange distortion that seems to be caused by the special elements which are used to provide the corrections that give the focused area its sharpness and color convergence.

For anyone shopping for zooms tho, you can see this effect in the viewfinder if you can aim at some suitable subject matter tho.  I find that tree branches in backgrounds, especially those where you also have plenty of sky available for contrast between them, will often show this distorted bokeh.  Just focus the lens in front of or behind the branches and play with focal length, focus position and aperture and you'll see the distortions show up as you make the changes.  On my 70-200/2.8 v2 I noticed entire sections of blurred branch actually disappearing at some settings! Very strange!

In general, I'm finding these radial bokeh effects show up more at close focus distances and at wide aperture settings.  They often diminish in effect when stopping down.
Your mileage may vary.

This is just another instance of where you need to be wary when everyone raves about how good some piece of gear is.  There's often a catch that's not been discussed as well.  Forums like this are good education opportunities.

Knowing this I've kept a lot of lower quality lenses on hand for just this reason.  Altho a cheap lens will rarely provide the biting sharpness of the pro glass, they'll also rarely show these same distracting aberrations.  They'll have their own problems of course.  But a $200 lens may provide you a workable option when the $2000 one fails in this way.  Some of my best images were made with second-hand consumer grade lenses merely because they provide a balanced "look" with adequate sharpness and smooth bokeh.  I wouldn't expect these cheap lenses to perform well at a race-track though, they focus too slowly.

467
Third Party Manufacturers / Re: Samyang 24mm tilt and shift
« on: December 28, 2012, 12:49:40 AM »
Exciting! Now if it's IQ is close to the Canon and it's priced around $1K or less, and we have a winner on our hands. If it's $600, it'd be really, really hard to resist buying it on the spot.

recent rumor price from russian site implies a price of a bit over $1000 on intro.
if if really performs, I'll be all over it even at intro price.

468
Lenses / Re: Bokeh confusion.
« on: December 28, 2012, 12:39:47 AM »
I find a practical solution is to NOT USE THAT LENS.
Choose something else when you know you'll have somewhat fine textures in the focus transition zone.

For all it's fabulous sharpness and great IS it has too much CA and horrid bokeh in such situations.
Have a look at a recent shot I put in the lens gallery as an example.

Since I got this lens last year I've been amazed at the sharpness and dismayed by the bokeh, often in the same shot.
I preferred my old, non-IS 70-200mm for better bokeh.  Might still grab a used one for the purpose.

If time and planning was possible, I'd have shot that scene with a prime.

469
EOS Bodies / Re: EOS 60D Stock Levels Getting Low?
« on: December 27, 2012, 03:03:03 AM »
In Canada, some of the better package deals I've seen the last week or 2 have been directly from Canon's online store.  They were on the 7D with 60D and Rebel kits also at promotional prices with extra lenses, flashes, tripods, bags, etc.
Looks like early 2013 for announcements.  If not at CES in January, then perhaps late Q1 to Q2.

470
EOS Bodies / Re: Moving to 6D from 5DII
« on: December 27, 2012, 02:58:41 AM »
IF the AF point in the middle  is sensitive as Canon claims it is a big bonus compared to 5dmk2 .

that too
Altho center AF on my 5d2 worked very well in super low light with a fast lens, no complaints.

471
A new Pentax Q w 5-15mm zoom, 17-50mm f/2.8 Tamron in F-mount and some special FX equipment I can use in the studio.
Looking fwd to playing with it all.
I've got a big empty pocket waiting for that miniscule Q!  Now I'll have a fun gadget to play with instead of pecking away at a cell phone like a typical schmuck whenever I'm waiting for whatever.

472
EOS Bodies / Re: EOS 60D Stock Levels Getting Low?
« on: December 25, 2012, 01:28:55 AM »
I'm starting to see some 7D promos that are pushing the price down now too.
Looks like Canon's starting to clear the channel of current inventory for some new crop-sensor product to be released sometime first half of 2013.
-

473
EOS Bodies / Re: Moving to 6D from 5DII
« on: December 23, 2012, 08:52:04 PM »
it seems to be a good choice, the FWC and QE is higher in 6d compare to 5dmk2 and 5dmk3.
You gain little bit in high iso and even in DR  but there is not any heavy visible banding in 6d as in 5dmk2 mk3 at base iso

I need to shoot some test shots with the 6D and see for myself how much difference there is in low ISO banding and noise structures.
I'd like to retain at least one decent Canon FF body.  The 5d2 was a disappointment to me from day 1.  I must've given too much credence to the FF fan boys out there who were raving about it at the time..
I'm a much harsher critic now.
6D fits my hand fairly well, would feel comfortable in use.
Just have to wait until cost differential of selling 5d2 to buying 6D is optimal.

474
EOS Bodies / Re: EOS 60D Stock Levels Getting Low?
« on: December 23, 2012, 08:36:48 PM »
60D's a great little all-rounder.  Along w 40D, this is my favorite Canon body.
with a 15-85mm on it, it's my first choice for one-camera solution to most (of my) uses.
Wish it had more tactile buttons on it tho, hard to use them with gloves.

475
EOS Bodies / Re: Moving to 6D from 5DII
« on: December 13, 2012, 07:47:38 PM »

I think the move would depend on what you were shooting. If your AF isn't having to track moving subjects, and you're using low ISO's I doubt there will be much difference unless features such as the electronic chromatic aberration correction improves overall IQ.

But if you were shooting moving subjects and needing to use high ISO's my guess would be that this camera is in a different league to the MK2.

+1
I'll keep my 5D2 for now. 6D does not look like enough of an improvement at low ISO where I use it to be a compelling up/side-grade.  OTOH, I need to look at some shots to see what the noise structure is like on the 6D.  If it doesn't have the heavily banded noise my 5D2 adds to low ISO shots then it might be worthwhile for me to migrate to it as a low cost FF EOS body.  Or just keep it around for well-lit studio shots where I won't ever have to push its files.
As it is, I have other, superior performing low ISO FF bodies to use when I need utmost IQ.

476
Third Party Manufacturers / New Nikon 70-200mm f/4 VR hands-on
« on: December 12, 2012, 02:45:01 AM »
Just picked one up today, had a bit of time to play with it indoors.

First impressions are very good.  It handles well; zoom and, more importantly, focus rings operate very smoothly with slight damping and very little dead-play from one direction to another so MF is quite usable (~150 degrees end to end) and much better than on the f/2.8 version I passed on because of sticky MF feel.

AF is quiet and fast, especially when the 3m and beyond limiter switch is on.  AF accuracy in low light, using center (cross type) AF point on a D5100 body was spot on at all distances between MFD of about 1m to about 8m I had available.

The VR (optical stabilization) worked very well also, getting pixel-sharp handheld shots at 200mm and 1/15s with no problem.  I suspect it could go even slower and still maintain a reasonable keeper rate.

Still have to do stop-down focus shift tests, check the bokeh, CA and corner shading on FF but so far, so good.  I'm looking forward to putting it to more tests and then shooting some real subjects with it.  The smaller size and reduced weight are pleasant changes from hauling around the big 2.8 glass. (altho the new Tamron 2.8 is interesting and will be considered as an option for my F-mount systems)

I did not opt for the very pricey OEM tripod mount.  I'll wait until there's a better value alternative but I would deem it a necessary item if using this lens with a lightweight body like the consumer-oriented D5100 or similar.  It's just too much mass and length to hang off the end of a plastic body when using a tripod.  It might be OK when mounted on a more substantial body like the D800 or other semi-pro or pro chassis.

Since I rarely use my EF 70-200 f/2.8 L 2 wide open, this smaller, lighter, and possibly as-sharp option may supplant one more bit of my Canon kit.  The latest Canon classic fast zoom has been disappointing me with ugly bokeh too often anyway.  I didn't use the EF 70-200/4 IS so can't compare it.

So if any Nikon users are considering this lens... YES, it's certainly worth considering.

477
Lenses / Re: Is this the normal bokeh for an L series lens
« on: December 07, 2012, 08:50:26 PM »
..  My customers often seem to most like the photos that I like the least! :o

I wish I knew why that was in my experience too.
Would be a lot cheaper for me if I didn't buy gear to make images that satisfied ME. :)

478
Lenses / Re: Canon 70-200 F/2.8 IS II vs. Tamron 70-200 F/2.8 VC
« on: December 07, 2012, 08:40:50 PM »
Roger says it's really only 175mm though: http://www.lensrentals.com/blog/2012/12/quick-resolution-tests-on-two-new-70-200s

That's very interesting.  Canon is better than Tamron @ 70mm, but Tamron is bettran Canon @ 200mm.  For 70-200mm lens, 200mm is more important.  That's really nice to see Tamron made another good lens.  However, it's three year late for me.  Since I have Canon 70-200mm already, I won't get this Tommy one.


just makes my decision for my next F-mount 70-200 harder... ???

479
Third Party Manufacturers / D5200 review
« on: December 07, 2012, 07:54:07 PM »
great if you can read the original Chinese?..

google translation is vaguely useful too.
Looks like an interesting camera, class-leading features?..  Some perhaps.
Looking forward to tests from sources I rely on.

meanwhile, here's the link posted by NR:

http://translate.google.com/translate?sl=zh-CN&tl=en&js=n&prev=_t&hl=en&ie=UTF-8&layout=2&eotf=1&u=http%3A%2F%2Fdc.pconline.com.cn%2Fpingce%2Fsmdfpcysr%2F1212%2F3094222_all.html%23content_page_1

480
Lenses / Re: Is this the normal bokeh for an L series lens
« on: November 30, 2012, 11:58:25 PM »
seems like aspherical correction elements, wide apertures and certain focal distances can make the onion highlites show up.  Many lenses will do this, tho not always at all settings.
YMMV

-

Pages: 1 ... 30 31 [32] 33 34 ... 55