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Messages - Aglet

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571
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

-

572
Lenses / Re: Canon 70-200 F/2.8 IS II vs. Tamron 70-200 F/2.8 VC
« on: November 30, 2012, 03:36:10 PM »
I'm looking fwd to trying Tam's new 70-200/2.8 VC
I use the older non-VC on my D800e and it's VERY sharp and optically well-behaved, sharp enough to show fine moire problems on fine repetitive textures at times so that's a match to the hi-rez camera.  AF is not quite as fast or precise as ultrasonic motored units but perfectly adequate for non-fast-action.  Build Q is not up to Canon's L either but it's enough for my use.

I use Canon's EF 70-200/2.8 L ISv2 on 5D2 and it's amazingly sharp and handles well but it shows more CA than the old Tamron and also surprises me at times with horridly busy bokeh that I haven't yet suffered with the Tamron's shots.  See the lens gallery for a sample of the ugly side of the Canon glass.

573
Lenses / Re: Just pulled trigger on 70-200 2.8L IS II USM - NEW - $1625.99
« on: November 27, 2012, 08:10:31 PM »
Great buy on an INCREDIBLE lens!!!  Every time I use mine I cannot BELIEVE its a zoom.  You will freak at the sharpness.


You might also freak at the bad bokeh in some situations.
Just be aware it's not all razor blades and cream.

see a sample I posted near the bottom of the page in the lens gallery here

www.canonrumors.com/forum/index.php?topic=819.225

It's got a number of focal lengths, subject distances and aperture settings where bokeh is less than pleasant.

574
Canon EF Zoom Lenses / Re: Canon EF 70-200mm f/2.8L IS II USM
« on: November 27, 2012, 03:27:11 AM »
Here's where NOT to use this lens.

This is the most hideous bokeh it's produced for me yet. The outlining almost looks like multiple exposures.

Avoid wide apertures with contrasty stuff in the transition zones, especially at or near min focus distance.
I've encountered plenty of other horrid bokeh scenarios with it too, usually at wider apertures it seems, but not at all focal lengths or distances.
Exhaustive testing won't be performed, just cursing when I see the results back on the computer.

Good thing this lens has plenty of redeeming qualities like incredible sharpness, speed and a great IS.

Here's a non-cropped shot from my 5D2

1/160s, f/4, 200mm, a few inches beyond min focus distance.

575

My Rebels already sit in a drawer while I take my D5100s all over the place.

are you a collector of entry level cameras?

Inadvertently, yes. :)

They do an excellent job for low ISO IQ in decent light, nearly as well as their pro-level contemporaries.
They cost a pittance second-hand and are easily resold with minimal, if any, loss of value if you don't keep them too long.
Entry level DSLRs are great cost/performance value, especially used ones!  I used plenty of them from Canon's Rebel line; the 350D, 400D, ending with the 450D.  Newer models had too much Canon characteristic red banding noise then the prices started going up too fast so switched to the Nikon D5100.  D5100 lacks a few minor features even older Rebel series had but the IQ/cost is terrific.  Worth it to me to keep some of both lines in inventory when I need a small light body to travel with and I know the work will be within their limitations.

I have good glass for both mounts, gives me plenty of options, depending on what I'm shooting.
I keep a few 450Ds and D5100s around, generally mounted to lenses I don't often use.
I reserve my big guns for more critical work, where their higher-end features are needed or warranted and their better raw files support more intensive PP work.

576
Lenses / Re: Bokeh Quality from Different Fullframes vs APS-C´s DLSRs?
« on: November 08, 2012, 01:21:49 AM »
Not really.  The supertele lenses are really optimized for sharpness.  Lens design is all about tradeoffs.  One lens known for particularly good bokeh (often described as 'creamy') is the 50mm f/1.2L.  That lens is optimized for bokeh, and the way that's done is to undercorrect for speherical aberration in the lens design.  When you do that, you get better bokeh, at the cost of a loss of some sharpness (and some focus shift, too).

without going into lens technicals I don't entirely understand I DO agree with this point.

I normally like very sharp lenses with very little CA.  That tends to require special types of elements and aspherical correction elements in the lens.  This often results in lenses with poorer bokeh, tho they may have really nice flat field performance, great sharpness and low CA.

I will often choose a lens that has no aspherical elements in it when I want one that will give me smoother, more pleasing looking bokeh for a shot.  For the most part, this works.  Old primes, if you can live with whatever their shortcomings may be, are sometimes good for this. These lenses will often have a lot of CA and coma though, which can either add or subtract from the overall image effect.

OTOH, there are many cheap modern consumer zooms and many perform better than some old primes and are far more plentiful and compatible with modern cameras.  I've got some used ones for as little as $100 that perform beautifully; acceptable sharpness of focussed subject and creamy smooth bokeh. (nikon 55-200mm VR comes to mind)  You can buy a lot of them to experiment with for the price of a used 50/1.2 L !

More complex modern zooms can be hit-and-miss.  Even within the same lens!
My 70-200 f/2.8 L IS II for example.  I haven't cataloged where it occurs but I know it does.  At certain focal lengths and apertures the bokeh on this lens is horrible!  But that only occurs in some situations over a very finite set of settings.  It actually provides reasonably decent bokeh most of the time.

And of course, the bigger the sensor, the more ability you have to generate out of focus areas and bokeh.

Tilt-shift lenses can be put to work too if you have the budget for them.




577
accordin' to:

www.techradar.com/reviews/cameras-and-camcorders/cameras/digital-slrs-hybrids/nikon-d5200-1110231/review

the sensor in the 5200 is not the same as the one in the 3200
and here's the interesting part

"The D5200 uses a new 24.1-million effective pixel sensor that has not been seen elsewhere and according to Nikon we can expect the new device to have a more extensive dynamic range."

really?!?...   Su-wheet! :)
cuz the d5100 DR is pretty awesome at low ISO, the d3200's less than a stop behind it, despite the tiny pixels.
 
So if they've managed to bump the DR back up a little, comparable to at least the D5100 again on a per-pixel basis, that's gonna be a wicked little imaging tool!

My Rebels already sit in a drawer while I take my D5100s all over the place.

578
$1500 for the 70-200/2.8 VC Tamron is not bad...
cheaper than the new Nikon f/4 VR I have on order!  I might have to cancel that and wait for some test results on the 2 of them.

I have the older non-VC Tamron, IQ is excellent and worth every penny of the $700 I paid for it, even if MF is a little touchy.

579
I was pleasantly surprised to find my 7D with 100-400mm L, zoomed to 400m, was able to track birds in flight using center spot AF, servo mode, in very low light well after sunset where ISO 3200 wasn't adequate any more and 6400 wasn't what I wanted to use.
OTOH, I've had it fail in broad daylight.

580
Detailed set of pages describing the new cameras features and specs

http://imaging.nikon.com/lineup/dslr/d5200/

This is gonna be a pretty impressive bit of kit and serious competition for the Rebel line.

Hopefully it won't have a tilted image relative to the viewfinder like many of the D5100s I tested!
Despite which I just got a 3rd d5100 cuz they're just so low cost right now.

appended
this is not a rumor! :)

581
but back to the topic...

Nik's just put a lot of nice features and performance upgrades into the D5200
can't wait to see how well it performs
Looks like it could be a Rebels vs Ninjas (?) battle and the ninjas just got new laser rifles.

this consumer class of camera is a large volume low margin thing, production cost has to be low
considering I just bought a new D5100 body yesterday for $430 (Yes I knew the 5200 would out this week) the supply chain can't be losing money on it

putting this much into the consumer end I'd hope the next levels up will get more than just build quality improvements

582
Lenses / Re: Canon Announces New Lens Caps!
« on: November 06, 2012, 04:22:47 PM »
Best new Canon product this year!
Now I'm going to have to put these new caps on all my lenses and shoot test shots all over again!

... They'll probably have light leaks. :(

583
Lenses / Re: 24-70/4 MFT charts
« on: November 06, 2012, 04:20:25 PM »
Canon again acted like there was no one else on the market.

Why would you spend double as much as for the 24-105?

Why would you spend considerably more than for the Tamron 24-70?

I hoped this lens was supposed to be priced in the same league of the 17-40. Charging 1500$ for a 24-70 f/4 zoom is ridiculous.

Canon had provided 2 very good midrange zooms in the last couple months. Both kind of pricey.
which might have an unintended effect of making Tamon's fast stabilized version look like the best possible compromise and price point.

584
Third Party Manufacturers / Re: D600 High ISO Examples
« on: November 01, 2012, 12:51:54 AM »
Yep... mine gets dusty.  It is just dust though... and does get blown off with a Giottos Rocket Blower.  It is annoying... but worth the hassle (IMO) for the incredible image quality.

I've managed to ADD more spots to my sensors using the Giottos Rocket blower.

Sticky little particles that may be tiny bits of the mold-release wax using in the rubber molding process.

Pity, it's an otherwise effective and easy to use tool.

I'd advise others to be wary of using this product to clean sensors.  I've yet to find a more suitable product tho. might end up building my own using a highly filtered airless compressor, accumulator and regulator with a final sub-micron filter before the final nozzle.

585
EOS Bodies / Re: Official DXOMark Sensor Score for the EOS-1D X
« on: October 31, 2012, 11:42:13 AM »
Surprise! Surprise!  There's NO surprise!

1Dx is a very good camera in all the metrics except the one where Canon is just plain behind and has made only marginal improvements in the last (nearly) decade.

Let's wish them well in their R&D for the next generation of sensor tech.
Which might end up in a Rebel long before it sees a pro body - unless their high MP FF rumor manages to see the light of day.

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