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Messages - heptagon

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Lenses / Re: TS-E 90mm f/2.8 Tilt-Shift for product photography?
« on: February 13, 2013, 03:29:50 PM »
I've been doing some food photography with the 100 macro lately, and the DOF limitations have gotten me thinking about TS-E's.  What are people's thoughts on getting the 90 versus the 45 with a 2X telecoverter?  Seems like the latter would be more versatile, but is there a big IQ tradeoff?

Huge trade off, don't do it. The 90 is a very sharp lens, the 45 not so much, with the 2x convertor the 45 becomes practically useless.

If the lens is less sharp than the camera, there's no point in using a TC, just crop it and you still have a better quality.

EOS Bodies - For Stills / Re: To buy the 6D or the 5DM3 and Which Lens
« on: February 12, 2013, 03:57:47 PM »
Heh, I have the same question right now. 

I'm undecided between Canon 24-105 L f/4 IS, Tamron 24-70 f/2.8 IS and Canon 24-70 f/2.8 L II.

The Canon 24-70 f/2.8 L II clearly has the advantage of resolution wide open but it lacks IS and is much more expensive. I'm not sure if this lens is worth it and if the lack of IS isn't worse than having a little less resolution with the Tamron. But then one can compare the Tamron with the Canon 24-105. They have comparable resolution and contrast. Which of these would you take and what would you shoot with it? Do you need f/2.8 or would you use f/5.6 or higher anyways?

Also between the 6D and 5D III, clearly the 5D III has the better autofocus but if one only uses the center point that doesn't matter. Then the 6D should have slightly better image quality. But it has only one card slot, so a no-go for many professionals. I'd like to take the 5D III because I'd like to experiment with that autofocus and maybe later I can switch back or upgrade to the 6D II in a few years.

So many options, so many opinions...

EOS Bodies / Re: Big Megapixel Camera in 2014
« on: February 07, 2013, 02:58:01 AM »
Let me re-phrase that: [CR2] No big megapixel or new sensor in 2013.

Technical Support / Re: IS to control SUBJECT motion???
« on: January 10, 2013, 05:36:02 PM »

For this the readout noise will have to go down to about zero. But then you're right. The ultimate limit are spectrally resolved single photon counting devices. Per pixel we now have about 100 to 100000 photons, so these devices are not too unrealistic for future technology.

Pricewatch Deals / Re: EF 24-70 f/4L IS Available January 7, 2013
« on: January 03, 2013, 02:32:00 PM »
How does this stand up to the Tamron 24-70?

Lenses / Re: Exposure and focusing help with tilt/shift lenses
« on: January 03, 2013, 11:15:43 AM »
I use Av mode for focusing and flip over when done.

Canon General / Re: DxO Mark explained
« on: December 17, 2012, 04:03:24 AM »
Comparing noise at different resolutions makes no sense whatsoever. My one pixel camera has no noise at all, even at very high ISO; will you buy it from me?

Comparing the noise at the resolution you need makes perfectly sense. You need a 800 by 600 pixels image? Take any camera you get, crop the image and then scale the image to 800 by 600. Then you can really compare which camera/lens combination delivers you the best results for that specific resolution.

EOS Bodies - For Stills / Re: Canon EOS 6D Rating by DXOMark
« on: December 12, 2012, 07:13:12 PM »
Is it just me or does the 6D sensor slightly outperform the 5D3 sensor in dynamic range and is on par in everything else? Maybe Canon started moving and can improve their sensor performance after all.
yes they  can but it cost, they can shorten the analog signal way, more readout points/ADC .
They could surely get rid of the adjustable preamplifier and improve noise/DR performance at low ISO. High ISO would suffer but that doesn't matter in the studio.

EOS Bodies - For Stills / Re: Canon EOS 6D Rating by DXOMark
« on: December 12, 2012, 02:08:18 PM »
Is it just me or does the 6D sensor slightly outperform the 5D3 sensor in dynamic range and is on par in everything else? Maybe Canon started moving and can improve their sensor performance after all.

Third Party Manufacturers / Re: Tamron 70-200 f/2.8 Di VC USD Hands-On
« on: November 29, 2012, 03:00:24 AM »
Also need a 17 - 55 (approx) but the Canon f2.8 one is too expensive. Anyone know if the Sigma 17-50 2.8 is good?

The sigma is good, but it has some drawbacks. The focus ring only turns about a quarter from nearest to infinity. It's hard to impossible to focus a shot manually.

Also some photos are out of focus (phase AF, centerpoint) but i don't know if it's the error of the lens and if the tamron/canon lenses would have less focusing errors. In the reviews i hear no complaint about the autofocus that's just personal experience.

Third Party Manufacturers / Re: Sigma 35 f/1.4 DG HSM First Impressions
« on: November 21, 2012, 05:41:45 PM »
with the new lens series from sigma you donĀ“t need canon for that.
you can do it yourself.

Which means you don't need to have a camera with AFMA or software like FoCal??

Correct me if i'm wrong, but you use FoCal to estimate the error and then enter that number into the AFMA field of the camera. Now you replace the AFMA of the camera with the lens adjustment but you still need FoCal (or you just use magic lantern and jog the focus around manually).

Third Party Manufacturers / Re: Nikon Sales Rising
« on: November 05, 2012, 03:29:21 AM »
Are Canon cameras still outselling Nikon cameras 10:1?

EOS Bodies / Re: Official DXOMark Sensor Score for the EOS-1D X
« on: November 01, 2012, 03:29:31 AM »
Does anyone know how many points the weather sealing is in the score?

Third Party Manufacturers / Re: Patent: Tamron 150-600 f/5-6.3
« on: October 25, 2012, 11:12:16 PM »
It will all come down to the optical quality.  It has to about match the 100-400L at 400mm and f/5.6.  If it's substantially worse than that, and up-res of the 100-400L might beat it.
I kind of disagree, simply because this goes to 600mm. If it can match the 100-400 at f/5.6, then thats a really impressive feat, but, I think its equally important for it to be as sharp at 60mm as the 100-400 or 400 prime would be with a TC on. Cause if it is, then the fact it does it natively could be another leg up.

But really, the key is gonna be price. If its around the same price as the 200-500, then the range it gives might cause birders to go with it over the 100-400 (IS less important, and 600mm more critical than 400mm). Especially if a new 100-400 comes out and raises prices. If it costs more like $1300, then I can't see as many going with it

What I meant was, it'll have to be as good at 600mm and f/6.3 as the 100-400L is at 400mm and f/5.6.  If it's not, an upres of or teleconverter attached to the 100-400L could equal or beat the Tamron, making it pointless.

That is always the problem of cheap tele lenses. Even the 100-400L has no edge over a 300+1.4TC.

EOS Bodies / Re: 60D or t4i for video?
« on: October 22, 2012, 03:53:13 AM »
You should definitely have a look into magic lantern which doesn't support the 650D yet. (Or does it already?)

If you want to save yourself some money you could also look for the 550D/t2i which has the same sensor as the 60D. Even if it's just for a backup camera which you should have ready.

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