There seems to be a few of the 20mm still up for sale http://www.ebay.co.uk/itm/Sigma-20mm-F-1-8-EX-Asph-DG-DF-RF-AF-Wide-Lens-For-Pen... This lens gets very mixed reviews though.

I just learnt a useful thing from the comments beneath the video - namely, that you can toggle the function of the 4-way switch by using the small button immediately above it. So you can switch between using the 4-way to move focus point to adjusting white balance or setting continuous shooting very quickly. I hadn't picked up on that before.

Early days yet but I feel I am seeing improved tone and detail in my K1 shots. This is particularly evident in landscapes/cityscapes. For example this shot I took of Waterloo Bridge between the showers on Monday has good detail although it was taken with the nothing grander than the 28-105 mm lens.




Edit: you will have to take my word for it because re-sizing has destroyed the detail I was trying to show I will try posting it in the gallery to see if it fares any better.

I have the Calumet version, but I assume they are all much the same. I have only used mine for still photography. It shows exactly the same information that would be on the camera rear screen, either live view or review - in fact when it is connected it becomes the rear screen, the one on the camera goes blank. Just the same as if you connect your camera to a television with an HDMI cable.

A field monitor such as this would do what you are asking http://www.ebay.co.uk/itm/VILTROX-DC-70-7-HD-1024-600-Video-Field-Monitor-HDMI-A... liked with an HDMI cable of sufficient length.

I had a play with one of the newer versions in John Lewis and found that the EVF was too small to be comfortable to use (perhaps because I wear spectacles). So not having it may not be such a drawback.

When you are in 'sel' the 4 way switch is changing the selected focus point so cannot perform it's other functions.

Be sure to have a play before you decide David. The 70-200 is massive next to the 200 prime. In fact the 70-200 is over 400gm heavier than the combined weight of the 50-135 and 200 lenses. Not a deal breaker but a factor to consider.

There are some other exceptions. My Sigma 24-70 is shortest at the long end - well, at about 65mm to be more precise.

Depending on your intended use you could use one of these
http://www.ebay.co.uk/itm/251501046141?_trksid=p2055119.m1438.l2649&ssPageName=S...

Or these
http://www.crookedimaging.co.uk/lastosyncpen01-lastolite-straight-ttl-sync-flash...

I prefer the straight Lastolite cable myself but not many places seem to stock it.