I don't think there's much to add to the review. The tripods are compact and light to carry but very sturdy and with a terrific ball head. When I upgrade a tripod it will be Eddie.

You shouldn't need to turn the brightness down or do anything in particular to get spectacular battery life. So maybe a fault? Could be charger, battery or camera.

I think the reference might be to the option of a Li-ion battery pacl in the K-r. Without flash and with an expectation of 920 shots per charge, not many batteries will be needed!

As it happens I know what you're talking about, so here's the links to the reviews I did of Brian and Eddie:

http://www.ephotozine.com/article/3-Legged-Thing-X1-Brian-Tripod-15245

http://www.ephotozine.com/article/3-Legged-Thing-X2-Eddie-Tripod-15244

The trouble is, it's got nothing to do with T stops, which tends to cloud the issue. The link you have provided doesn't seem relevant either, it's disucssing using different focusing screens to make focusing easier with different lenses. Nothing new in that. There was a recommended screen for the Pentax 50mm f1.2 as well.

T stops refer to the actual transmission on lenses and were used more extensively in cinematography.

In the sort of photography we do there's not really any need for T stops, especially as the transmission of modern lenses is very high and it makes little practical difference.

Can you clarify exactly what the problem is Algi?

Optics is optics, so if you shoot at f1.4 then that's the DOF you get and that's it. There's no other way.

It's impossible for a DOF for a different aperture to be recorded as the image.

What might well be possible is that the camera meter will not correctly measure the amount of light at f1.4 and f1.2, and in fact this effect is well documented and mentioned in relevant lens manuals. All you need to do is meter at a different aperture and extrapolate the measurement.

Likewise, often camera bodies will be unhappy with f22 and smaller apertures, especially at higher ISO values. This too is in the manuals where appropriate.

The confusion probably stems from us wanting things without having a purpose for them.

The 645D has its own quite definite purpose and if you need it you need it and it will be unsurpassed.

I want an iPad, for example, but in reality have no real purpose for one.

A Flikr or Photobucket account sounds fine, or why not use Facebook?

Not speaking in riddles would help enormously....

Custom setting "using aperture ring" needs to be set to "permitted" after which you can use your M series lens in manual mode. You need to stop down the lens to take a meter reading and the reading may not be accurate, but you can use the lens.

To avoid any of this inconvenience, any lens that has an "A" on the aperture ring will be fully functional. This means lenses from the A series onwards.