Messages

1

Lenses / Re: Please help, did I receive a defective lens? 40mm f/2.8

« on: December 31, 2012, 02:58:23 AM »

I noticed the same behavior when i bought mine to compliment a 6D kit.
AF is fine, slooow MF turns are quiet, but relatively rapid MF turns make a weak groan or zipper(ing) like sound.

The shop opened four packed one's as they had not noticed it (possibly due to higher ambient sound levels there).
They all sounded the same. They were going to test other (EF-S kit ??) lenses with the similar STM system.

As a post above mentions, it is probably a characteristic of the (40's and probably other lenses with this) STM implementation.

2

Lenses / Re: 24-105 f/4L kit lens on 6D

« on: December 13, 2012, 08:49:03 PM »

Thanks for your encouraging comments.
I picked up a 6D + 24-105 f/4L (kit) and the 40mm cake last weekend.

Marsu42:
The 6D spec says
Center: cross-type at f/5.6; vertical line-sensitive at f/2.8.

You are correct about the shallower DoF (shooting at f/2.8 ) being harder compared to the kit maxing at f/4.
However, i was seeking clarity about the inability of the f/4 kit lens to activate the vertical line threshold of the center AF sensor, since that requires a lens with max aperture of f/2.8 .

3

Lenses / 24-105 f/4L kit lens on 6D

« on: December 08, 2012, 03:21:29 AM »

Hi,
I plan to buy a 6D with 24-105 f/4L kit lens as an upgrade to a much lighter PnS with lens of similar FoV range that i currently use.
I realize the value this kit lens offers, both in price and the flexibility to determine what FL primes i (may) gravitate to over time.
However, i am anxious that it's weight may dampen my enthusiasm and hence contemplating a lighter 6D start point.

I have two questions
1. AF sensor
What perceivable impact does the f/4 kit lens impose, given that 6D's center x-point sensitivity is f/2.8?
Surely prior 5D bodies did not have a more forgiving f-stop requirement for AF?
The 24-70 f/2.8 L I or II is no lighter (and shorter and costlier)...but (on a 6D) is it noticeable more responsive for AF and in low light?

2. Your experience
If you moved away from this initial kit lens onto others, what constraints/findings led you to do this and to what alternatives?


Thanks
roka

4

Lenses / Lens of toddler stills and video

« on: May 21, 2012, 09:16:59 PM »

Requirement:
Capture moving toddler stills and video indoors in evening or low-light with a 5DMk3 and no external flash.

Context:
Please ignore: lens IQ, colour rnedition, bokeh.
Please consider: lens f-stop, AF speed, MF handling/feedback where applicable.

Questions:
1. Did you find the current EF 24-70L f/2.8 (set ~50mm) fast enough for this?
2. Did you find the need for a (say) EF 50 f/1.4 necessary?
3. Is increasing the ISO (now possible on 5DMk3) a workable option. Why not?
4. Is opting for a Zeiss ZE 50 f/1.4 and resorting to MF/practice a workable option (to the EF 50 f/1.4)?

I realize that handling this in person will sort me out, but i'm trying to guage what folks found/settled on over time and in hindsight. Specifically, if holding out for the EF 24-70L f/2.8 II will suffice or pursuing the ZE 50 f/1.4 still makes sense...assuming i get on with it.

Thanks for your response.