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Messages - neuroanatomist

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Pricewatch Deals / Re: Canon Center Pinch Lens Caps Now Shipping
« on: February 25, 2013, 10:55:22 PM »
These things were announced November 5th,
It really took them nearly four months to get them in to stores? I thought these had been available for months already.

Yes, it only took them four months.  For Canon, that's pretty damn fast...  ::)

Software & Accessories / Re: Circular polarizer for the 16-35
« on: February 25, 2013, 10:17:39 PM »
Yes, the XS-Pro has front threads.  I have the Slim, I don't use the cap but then I only put the CPL on during active use, and take it off before putting the lens away.  I normally keep an XS-Pro MRC UV filter on it (needed to complete the weather/dust seal). 

Software & Accessories / Re: Circular polarizer for the 16-35
« on: February 25, 2013, 09:14:38 PM »
That one (standard mount for CPL, which is ~7mm thick) will cause a slight increase in optical vignetting (<1 stop wide open).  You'd be better off with the Slim or XS-Pro mount. 

There will be banding on blue skies at wider than 24mm (assuming you're using it on a FF camera), but it's great for waterfalls, increasing saturation in foliage shots, etc.

For a travel tripod, it doesn't get much better than the Really Right Stuff TQC-14 and BH-30 LR.  But the Gitzo 1542T with the Markins Q3T would do nicely - a friend just got one to use with a 5DIII/7D + 100-400, and is quite pleased with it.

Third Party Manufacturers / Re: Nikon 7100 has been anounced
« on: February 25, 2013, 11:50:22 AM »
But Neuro ... especially as a Canon-user it is really tough to spot the feature in the somewhat unwieldy spec list!   :P

Tough to spot on a Nikon spec list, mabe...but that's better than impossible to spot on a Canon spec list, since it's not there at all (e.g. the 7D has AFMA, but it's not referenced in the specs). 

EOS Bodies / Re: 7DII and D400 Specs
« on: February 25, 2013, 10:53:05 AM »
There is a part of me that thinks Canon may differentiate the two by offering slightly fewer megapixels but better low-light performance in the 7D, as they have done with the ID-X.

That would make the 7DII a more interesting offering, from my perspective.  If it can come within 1.3 stops of the 1D X (i.e., right at the theoretical difference between APS-C and FF, vs. the currently greater advantage of the 1D X), coupled with a high-density AF sensor (e.g. 41 points with 20 crosses) and improved metering, that'll be an impressive camera...

With the Better Beamer, be sure to set the zoom head manually to 50mm (or wider); the usual recommendation is to apply a bit of negative FEC.  Personally, I often don't, because I'm using HSS to allow a high shutte speed, and I find that cuts the flash power sufficiently.

Also, a word of caution - be careful when using it to fill shadows when shooting in might find out the hard way why it's also called the Better Burner.  A Fresnel lens works both ways - it will concentrate the light output of the flash, but if the sun shines on the front, it can be focused on your gear with deleterious effects (burn/melt marks on plastic surfaces).

Third Party Manufacturers / Re: Nikon 7100 has been anounced
« on: February 25, 2013, 09:48:55 AM »
This 7100 may well be the sharpest APS-C camera around for a long time - in theory!

But no AFMA facility on it?

So in practice you may have to be very lucky to realise its full potential on your favourite lens.

Well, technically it doesn't have AFMA, because that's Canon's name for the feature.  But, what makes you think it doesn't have AF Fine Tune?  Might want to go read the specs again...

I wonder if its possible to make the 5D3 -EV3 like the 6D?

Almost certainly not...

If not then I wonder how they are going to fix this problem

The problem isn't one of sensitivity.  Users have reported that while AF is slower with the assist lamp on, simply turning off AF assist results in faster focus - that means even when there's plenty of light as far as the AF system is concerned, AF is slow.  So it's an algorithm tweak that's needed, as J.R. stated.

Lenses / Re: Help me decide... PLEASE
« on: February 24, 2013, 10:01:23 PM »
If you already have the 400 II, get the 600 II.

The FX-3 fits my 600EX-RT just fine.

Lighting / Re: St-E3 + 600ex-rt + 430EXii
« on: February 24, 2013, 03:29:35 PM »
Sorry, not possible with that setup. What you could do is buy an optical trigger for the 430EX II (you'd have to set power manually, no E-TTL II). Try one of these (you'll need the hotshoe adapter mentioned, too).

Lenses / Re: Best lens for baby portraits?
« on: February 24, 2013, 03:10:32 PM »
I'd forget about the 50 1.2 as too expensive for the minimal exposure advantage over the 1.4 - particularly with the new bodies much better performance at higher ISO settings.

The 50/1.2L isn't about getting a 1/2-stop exposure advantage over its cheaper cousins.  It's about pure, creamy bokeh-liciousness...

Lenses / Re: Why aren't zoom lenses faster than 2.8?
« on: February 24, 2013, 11:31:12 AM »
Although, we might still have to disagree on the conversion of apertures to 35mm equivalents. While converting the focal length to a 35mm equivalent makes sense (with the preponderance of different sensor sizes, it's good to have a commonly accepted way of understanding focal length), converting the aperture causes confusion.  At the same focus distance, a 30.5mm f/2.8 on a G15 has essentially the same background blur and requires the same shutter speed as a 30.5mm f/2.8 lens on a 7D and a 30.5mm f/2.8 lens on a 1Dx. In other words, a 30.5mm f/2.8 lens doesn't change any of its attributes when the sensor changes in size.   Therefore, there is no need to convert it to a 35mm equivalent.   The 30.5mm f2/8 is already a 35mm equivalent for every exposure and depth of field measurement.

But...if the 1D X is taking a head shot, the 7D is cutting off the chin and hair, and the G15 is giving you just the eyes and nose - not exactly a flattering portrait.  A more relevant comparison is similarly-framed shots, and then the 'crop factor' effect on DoF applies (because with a smaller sensor and the same lens, you're further from the subject for the same framing).

EOS Bodies - For Stills / Re: 5d3 Raw file corruption
« on: February 24, 2013, 08:51:10 AM »
The most likely culprit is a corrupt memory card.

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