I'm not a big fan of teleconverters, but the 50mm lens is the best lens to use one with. The 50mm f1.7 would be a better choice still though.

I'd quite some PU sweatshirts. Then I could choose between those and my ADAPS sweatshirts, depending upon the occasion.

That sounds like a great resource for your family, but I'd be inclined to preserve it as a paper record of all the material, with an attached CD or DVD version for day to day use. You might also consider a Blurb book version.

I'm afraid that whatever you do, unless someone else eventually takes up the task, sooner or later it will fall into disuse and have to be repeated by some future generation.

It's very difficult to keep anything for ever.

That's unusual, but very interesting.

DVDs are optical media, and the dyes do degrade with time.

Non-volatile memory may also decay, but magnetic media are pretty resilient. We still have all those 1950s and 1960s master tapes from the music industry, and, with a bit of care and some restoration work, we can still remaster from the original videotapes where the BBC didn't actually re-use them.

However, formats do become obsolete, for example the 5.25 inch floppy disk, and reading them might be a problem in the future.

Having said that, how often do we look at our 30 year old negatives? Maybe we are getting a bit too anxious about the future of images that, largely, we may not really need any more. We shoot new ones, don't we?

Rangefinders have their place and their own particular advantages, but they were replaced by SLRs in the late 1950s/early 1960s because the SLR addressed all their disadvantages.

There is still a small but deicated user base.

I'm not 100% convinced at this sudden attention to such as vague term as "bokeh", but it only really refers to the pleasantness (or otherwise) of out of focus areas. It's probably dependent on the number of diaphragm leaves as much as the computation of the lens.

The 70mm f2.4 is quite long enough and fast enough to produce out of focus areas at its wider apertures. It's equivalent to 105mm on film, and traditional 100/105mm lenses were brilliant for the purpose. The fact that it's slightly faster than they were will make up for the increased depth of field of a 70mm lens.

I think they may have forgotten to say "Maybe as many as 10 Photographers ditch DSLR cameras..."

They were tested wide open and two stops down, but I have only quoted the two stops down figures.

My favourites were the SMC Pentax-M 20mm f4, SMC Pentax 24mm f2.8 and SMC Pentax-M 100mm f2.8, all of which are fantastic lenses.

Unfortunately the rest of the world knows this as well and second hand prices are quite high.