Topics

1

Technical Support / Help ! How to configure 6D to direct AF point control

« on: May 12, 2013, 10:33:15 AM »

Being blokes, and we don't do manuals, can someone tell us how to configure the 6D to enable direct focus point control similar to Custom Function C.FnIII / 3 on the 5D mark ii ?

We have found the C Fn to enable direct AF selection with the 8 way controller, but there then seems to be no way of quickly returning to the centre point only as there is on the mkii by pushing the toggle in. I had assumed that the obvious button would be to press the 'set' button, but this seems to be disabled when having direct control of the 8 way controller.

On the C Fn menu for the 'set' button it doesn't list anything to do with AF.

Confused 

2

Lenses / Conflicting results between The-Digital-Picture & Photozone

« on: April 08, 2013, 09:53:49 AM »

Is anyone else confused by the apparent differences in resolution tests performed by The Digital Picture and Photozone ?

On TDP's ISO 12233 charts they can show very different results to photozone's MTF graphs.

For example take the 70-300L and 70-200 f4 IS results; two lenses which people looking for a tele zoom are very likely to be having to decide between. Using 70mm as an example, on TDP's 12233 charts the 70-200 is clearly ( pun intended ) way ahead of the 70-300L, I mean it is like night and day, whereas on Photozone's graphs the 70-300L is clearly showing better results.

Another example is the resolution of the 24-105L. TDP clearly shows this lens to be at its over-the-frame best at 70mm / f8, whereas photozone's results do not confirm this - at all. They show it to be better in the 35-50 region.

In 'field' applications my experiences would suggest photozone is giving a truer picture.

Could these differences be the result of copy variances ? if so it is very disturbing for someone wanting to purchase a high quality lens.

3

Lenses / Variable length zooms and dust

« on: December 22, 2012, 01:21:50 PM »

I have a question regarding zoom lenses that change their physical length, such as 24-105L,  70-300L etc, and the potential for them to ingest dust, pollen etc into both the camera body and themselves by sucking and blowing air in and out.

Is this a fact ?

If this is the case I am puzzled as to why when fitting a weather sealed zoom of this type onto a weather sealed body you don't have problems in zooming the lens outwards against a vacuum that would be created in the body.
Now I know that weather sealed doesn't mean airtight, but even so I would expect resistance when trying to zoom in or out quickly as the air tries to pass the weather sealing gaskets.

Can anyone explain

4

Technical Support / Mirror fallen out of 5D - self repair ?

« on: December 14, 2012, 07:58:59 AM »

Our Building Panoramics 5d MK1's mirror has finally fallen off its perch after seven years.

I know this is a design fault and Canon modify the mirror free of charge, but has anyone tried to glue the mirror back themselves ? It seems like a very light dot of super glue on the four little cushions / adhering points would fix it.

I'd appreciate experience from anyone who's fixed this themselves.

Thanks,

5

Lens Gallery / Canon EF 35mm f/2

« on: December 04, 2012, 03:16:22 PM »

I know there was a thread on images from this humble little lens in 2011, but it appears to have been held in such contempt there were zero replies !!

With all the excitement around the arrival of the new 35 f2 IS and the Sigma f1.4, how about posting your best shots taken with the old 35 f2 ?

At Building Panoramics we now have an EF 35 f1.4, and guess what - at the apertures that we use this little lens is just as good. ( The same cannot be said for the manual focus however.................)

Here are a few of our images taken with this lens. For those that are interested Selby Abbey was the first Benedictine Monastery founded in the North of England after the Norman conquest in 1066.