It's mentioned in the review in the context of the screw thread versions. The f/2 version is the f/1.8 with a baffle that reduces the aperture.

You want an HDMI cable Type D.

Flash memory such as SD cards isn't somewhere I'd want to store images, even the instructions say that cards not used for a long time may be unreadable.

The multiple hard drive route is one way, but eventually all these will fail as long term storage unless maintained by us. Nobody will do that in the decades beyond us, the drives will probably end up in the bin.

The ubiquitous suitcase of old prints has much better odds of surviving long term.

Yes, a good optical viewfinder would take some beating. Any EVF is still a screen, you need to switch it on and you need battery power. A pentaprism DSLR gives a more unfettered view of the world, surrounded by a wonderful black surround that throws the image into sharp relief. Best of the lot is the 67 viewfinder, which is amazing.

Having said that, the 1959 Voigtlander Bessamatic has a better optical viewfinder again, but only because it's an aerial image and only the very centre is a ground glass that can be used for focusing.

We get most of them, but sometimes one slips through!

Many thanks for posting, that was very interesting.

The Pentax X90 or X-5 bridge camera seem to be capable of excellent results. Both are discontinued but may well be available of eBay.

Any of the lenses listed should be sharp enough stopped down to f/8 or so.

The alternative might be the SMC Pentax-FA 20-35mm f/4 - not commonly found but not impossible to find a good example.

It's probably a question of whether or not that jump is significant and what features become important.

Moving from APS-C to MF would be a huge step in quality, but then again also a huge step in size, weight, cost and handling difficulty. To get that quality would mean heavy, solid tripods, slower work and so on.

Moving from APS-C to FF gives significant quality change, but only with careful technique, with a more modest penalty in terms of weight, bulk and cost. Operational speed remains pretty much unchanged apart from frame rates.

Moving from FF to MF I'm not so sure I need now. Maybe if I was shooting studio shots of cars for brochures or landscapes for display in station concourses, but otherwise the extra penalties outlined above might be too much.

I always thought the F series were a bit ugly, but this one is a sort of hybrid design that looks a bit like an FA series lens. The FA lenses I thought had cleaner lines.

However, the one shot I've fired off so far showed plenty of keen sharpness, although some clearly visible CA. Unfortunately I took the shot before Sue had tidied up, so I'm not allowed to show it!