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Messages - neuroanatomist

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6151
I've used tubes and close-up lenses, and I have the 100 L Macro.  All have pluses and minuses. 

Tubes: work best with short focal lengths (added mag is focal length / tube length), no optics so no direct effect on IQ, some lost light (autoexposure compensates).  The 40/2.8 with a 25mm tube works quite well.

Close-up lenses: work best with tele lenses (70-100mm is 'break even' between tubes and close-up lenses), no light loss, fixed working distance (front element to subject is 50cm with 500D, 25cm with 250D), slight optical decrement (but it was hard for me to distinguish the 100 L from the 500D on a 70-200 II in terms of IQ)

Macro lens: best IQ, most flexibility, most expensive

6152
Have you guys heard about the 24-70 f4? I just don't understand this lens... Does it have better IQ then the 24-105 f4?

IQ is similar (slightly better at some focal lengths, worse at others).  It's a little smaller and lighter. Main advantage is the 24-70/4 IS is also a near-macro lens.  This morning I needed to switch from my 24-70/2.8 II to the 100L for some close-ups (0.4-0.5x), wouldn't have had to do that with the 24-70/4.  But that doesn't happen often enough to make the 24-70/4 interesting to me, especially at its current price.

6153
Not exactly a 'favorite' but I couldn't get by without unsharp mask.

6154
Lenses / Re: EF 200-400 f/4L IS 1.4x Release Date [CR1]
« on: April 27, 2013, 08:59:03 AM »
...May 14, 2013 is the day the lens will be officially announced with availability coming in September/October 2013

Gee, that's nice.  But then, the MkII supertele lenses were officially announced with availability about 6 months later...and then it was 14-18 months before the lenses were actually available.

6155
Software & Accessories / Re: Tripod- RRS or Gitzo with rebate??
« on: April 27, 2013, 04:44:07 AM »
You really can't go wrong with either.  Personally, I thing RRS is just a little more right.  ;)

6156
EOS Bodies - For Stills / Re: Why do we buy Canon? What idiots are we?
« on: April 27, 2013, 04:38:53 AM »
At least only one of us 'idiots' on this forum doesn't know the difference between a lens and a camera, dilbert.

6157
Software & Accessories / Re: Screw-on ND filter for 16-35 II
« on: April 26, 2013, 07:03:56 PM »
You shouldn't see additional vignetting with the F-Pro mount on the 16-35L II.



6158
Normally at low power, the flash only partially discharges and can keep on going even while its recharging.

IIRC, that's controlled by a C.Fn on the flash. I wonder if being an RT slave affects that?  Another function has the slaves report back when recharged, and the master beeps when all slaves have reported - maybe that forces a wait until all slaves are charged, so turning it off may help.

6159
PowerShot S100, and if I needed to replace it, I'd get a Sony RX-100.

6160
Lenses / Re: 70-200 f2.8 MkI & Mk II and Extenders
« on: April 26, 2013, 11:30:28 AM »
70-200/2.8 MkI doesn't take extenders well.  MkII takes the 2xII/III well, almost but not quite up to the IQ of the 100-400L.

6161
Do you face problems with vignetting using both the 10 stop and the CPL at wide apertures? I tried doing this with the Hoya screw-in filters (NDX8 and a CPL) on the 24-105 @ 24mm and the vignetting was terrible.

I usually only stack them on my TS-E 24L II, no issues with vignetting there.

6162
Lenses / Re: Aperture and Light
« on: April 25, 2013, 07:55:45 AM »
I just got the new 24-70 to replace my Mark I version of the lens.  Here is my question, given that the new lens has a diameter of 5mm more, does that mean that more light enters the lens?  I presume yes.  So, following that presumption, shooting the same subject in the same lighting at the same aperture and ISO speed, does the 82mm lens need less time to properly expose the subject?  If it does, it follows that the new lens is better in low light, correct?

Unfortunately, I sold the Mark I lens the day before the Mark II arrived in the mail so I was unable to test the theory.

More light might enter the front of the lens, but since the aperture controls the amount of light reaching the center, the 'extra' light won't change the exposure.

The bigger front element means less vignetting (and can help with other aberrations). 

6163
+1 on the tripod.

Big Stopper for the Lee holder - I have screw-in 10-stop NDs (B+W/Schneider), they're good but you can sometimes alter zoom on an extending lens as you screw it on. The Lee makes it easy to compose, meter and focus, then change exposure and slide the filter into place. 

I sometimes use both the 10-stop and a CPL.

6164
Software & Accessories / Re: Lowepro Toploader 80/85 Pro AW
« on: April 24, 2013, 10:35:12 PM »
Yeah, I'm getting posts blocked too.

I do recall the waist strap now, sorry!  Definitely not intended to be a weight bearing strap.

6165
EOS Bodies - For Stills / Re: New user / review instant zoom?
« on: April 24, 2013, 10:23:21 PM »
Turn off the backscreen, problem solved and u will focus more on actually taking photos

Now that's helpful.  I recommend you switch to a film SLR, having to pay per frame and wait a couple of days to see if a shot worked will teach you to be a better photographer. Maybe a psychiatrist can help you be a nicer person.

@ OP, use Custom Controls to assign Magnify to the Set button, and in one of the Playback menus there's a magnification setting, set that to Actual Size. Pressing Set during image review or playback will take you to a 100% view at your selected AF Point.

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