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Messages - neuroanatomist

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7651
Software & Accessories / Re: Variable ND question
« on: August 20, 2012, 11:46:26 AM »
I've mentioned the 'Maltese cross' effect in many posts (6-7 times, at least!) - it's the main reason I don't use a variable ND filter.  Anyone who's used a CPL on an ultrawide lens is familiar with the uneven polarization you see with wide and especially ultrawide angles.  A variable ND filter is basically a stacked pair of polarizers (one linear, one circular), and as such, that uneven polarization gives rise to the dark cross.  MRLinVA, you didn't see it on your 7D because of the crop factor - the same lens gives a wider FoV on FF, meaning more susceptibility to the effect.

7652
EOS Bodies / Re: Canon 1D MKIV VS 1DX Cameras
« on: August 20, 2012, 10:46:07 AM »
Also, my AFMA settings have been much closer to zero with the 1DX as compared to the 1D4 but that might just be my camera bodies and your mileage may vary. 

My adjustments on the 1D X have not necessarily been closer to zero (although some are), but what I have noticed is that the variances are less - when I test lenses at different distances and focal lengths (for zooms), all the values are clustered more tightly and usually all within 3-4 units, compared to the 5DII and 7D where there could be up to 12 unit differences with one lens.

7653
Lenses / Re: Going to FF from APS-C, need lens advice
« on: August 20, 2012, 10:15:11 AM »
I will repeat though that copy variability can be a source of opinion both good and bad for lenses.
Agreed.  Also, it need not be inherent sharpness - most of my zoom lenses have required different AF microadjustments across the range, so the focus can be right on at the wide end but off at the tele end, or vice versa.  I'm glad the 1D X and 5DIII have the capability to enter two AFMA values for zooms (although even then, sometimes that's not enough...).

7654
Lenses / Re: Going to FF from APS-C, need lens advice
« on: August 20, 2012, 09:54:54 AM »
I stand corrected.  I hadn't realized that lenses that produce razor sharp images were no longer considered magnificent.  My apologies. 

Also, in my universe... the 70-300mm is very mushy at 300mm.  Much mushier then the 70-200mm +1.4x and cropped to make up for the 20mm loss in optical focal length.  And while I agree that the 70-200 + 2.0x is mushy (I don't own a 2.0x TC because i don't have an appetite for the soft images) at least the OP would have AF and another 100mm then the already mushy 70-300 "L" at 300mm.


Interesting.  I've used a 70-200mm MkI on a couple of occasions, and 'razor sharp' was not my experience, at least when shooting wide open.  My MkII, OTOH, is razor sharp.

As for the 70-300L, do you own one?  If so, you might want to have Canon check it over - as I linked above (here it is again), Bryan at TDP found just the opposite, and nothing mushy about the 70-300L at 300mm.  Now, if you want 'mushy' just set that aperture drop down to wide open (f/4) at 280mm - like this.

7655
Technical Support / Re: 60D Dust Help
« on: August 20, 2012, 09:20:02 AM »
If you're seeing actual small specs, it's unlikely to be on the mirror, since the mirror is not a focal plane (much like a speck on the front element, it won't resolve as a discrete point).  Rather, the dust is most likely on the focusing screen (the accessible bottom or the inaccessible top).

I agree with Paul that a competent tech can clean that, and it sounds like your tech was not the best.

7656
EOS Bodies / Re: Your Canon EOS-1D X user tips
« on: August 20, 2012, 09:15:22 AM »
Yes, I've tried the multi-spot metering, although I don't use it routinely...

7657
EOS Bodies / Re: Your Canon EOS-1D X user tips
« on: August 20, 2012, 08:26:05 AM »
May I also ask what is your preferred buttons configuration? Warm thanks. I am thinking of assigning RAW/JPEG switch to DOF, and ISO setting to the SET button... I have also assigned  *H to the * button.

Most of mine are default - I actually use AE Lock and DoF Preview as intended reasonably often.  I do have back-button AF set up, direct AF point selection with the multicontroller, and my M.Fn1 button is set to "C" (successive presses cycle between the C# settings, thanks Rich for the suggestion!).

7658
EOS Bodies / Re: Your Canon EOS-1D X user tips
« on: August 20, 2012, 06:39:23 AM »
According to page 339 of the manual, if you are in One-Shot AF mode and you press the configured button the camera switches to AI Servo and you dont have to hold down the button. It seems it only works if you keep holding the button...

You might want to re-read that page.  Hold ≠ press.  Nowhere does it say when you press the button.  FWIW, I have this assigned to my M.Fn2 button, and it's quite handy - I can hold it down with my ring finger easily while shooting.

7659
Lenses / Re: Going to FF from APS-C, need lens advice
« on: August 20, 2012, 06:28:32 AM »
However the 70-300 is no where near as sharp as the 70-200.


In what parallel universe?  Unless you're talking about the 70-300 non-L, in which case, certainly.  But, the OP has the 70-200/2.8 IS MkI, and the 70-300mm L is a fair match for sharpness across the range when the 70-200 is stopped down to comparable apertures (and with both wide open, the 70-300L is sharper). 

He currently has a 70-200 F2.8 IS which is a magnificent lens.  It works well with both the 1.4x and 2.0x tc and will autofocus with any camera with either converter giving a usable range of 70-400mm


Allow me to edit for content:  He currently has a 70-200 F2.8 IS which is a magnificent very good lens.  It works well sort of ok with both the 1.4x and delivers soft images with the 2.0x tc and will autofocus with any camera with either converter giving a usable range of 70-400mm280mm, or 70-400mm if you have a high tolerance for mushy images

If the OP had the 70-200/2.8 IS MkII, it would be a different story.  But the MkI is the least sharp of the three 70-200/2.8 zooms (and the f/4 IS is sharper, as well), and the MkI does not handle teleconverters well at all. 

For example - you can see that comparing 70-200/2.8 IS at 280mm f/5.6 (stopped down) to the 70-300 L at 300mm f/5.6, the latter is sharper.  As for the 2x TC, here's what that does to IQ.  Hmmm...looking at that, the effect in the center is not as bad as I anticipated - but that's because the bare lens at 200mm f/2.8 is not that good in the center (at least, when compared to the MkII). 

So, compared to the 70-200/2.8 IS, the 70-300L would be an IQ upgrade if the OP needs the 200-300mm range, but the tradeoff is a loss of one stop of light.

7660
EOS Bodies / Re: Canon EOS 7D Mark II Specs? [CR1]
« on: August 19, 2012, 10:21:08 PM »
Sounds good to me...   I'll believe the "noticeably lower noise than the current 18MP," when I see the RAW files, and not a moment sooner.   ::)

7661
EOS Bodies - For Stills / Re: ISO levels
« on: August 19, 2012, 08:27:14 PM »
The 'tweener' stops are pushed or pulled from full stops.  Pulling is ok (a little better than ok, actually, there slightly less noise than the next-higher full stop), but pushing increases noise. So, ISO 125, 250, 500, 1000, etc. will have a little bit more noise.  In the C.Fn's you can set it so ISO is selected in 1/3 (default) or full stop increments.  If you use Auto ISO, the camera will use 1/3 stops regardless of that setting.

Personally, I have it set to full stops - but that's not because of the push/pull noise effects (which I believe are real, but practically not significant), but rather because it means I can ramp ISO up or down 3x faster with fewer clicks of the wheel - and that's an actual practical benefit.

7662
Lenses / Re: Going to FF from APS-C, need lens advice
« on: August 19, 2012, 05:37:28 PM »
Oh, what is one to do to get the right equipment in the FF world if one has been living for a decade in the APS-C world?

Spend money. Lots of money.  :P

7663
Lenses / Re: Going to FF from APS-C, need lens advice
« on: August 19, 2012, 04:12:42 PM »
...I would never wait for a rumor like that one.

Rumor?!?  Heck, these days, even a formal announcement from Canon is no guarantee that a lens will be available anytime soon…

7664
Pricewatch Deals / Re: 1D Mark IV in Canon Refurb Store
« on: August 19, 2012, 03:25:54 PM »
Oh just buy it already :)

Ok, Mr. Smarty-Pants,  :P  which would you pick - 1DIV plus 500 II, or 600 II to use with 1D X?

7665
Pricewatch Deals / Re: 1D Mark IV in Canon Refurb Store
« on: August 19, 2012, 03:06:41 PM »
Been in stock every time I've checked over the past 3 days. So far, I've resisted temptation.

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