Irfanview does resizing very well with automatic sharpening built in. It also has a plug-in that allows one to do a lossless crop of a jpeg.

John

Also try recharging the battery in case it has coincidentally just run out.

John

I think you're using different modes to each other!

Steve is in Av, Algi is in M.

John

In the past I have found that Irfanview lost the EXIF data after resizing images. However, I have just installed the current version, 4.33, and this now keeps the EXIF data on the saved resized images.

http://www.irfanview.com/

John

Set the camera dial to TAv.
Turn the camera on and look at the info screen.
What mode does the camera show?
For me it's Av !

Now repeat that setting Tv. The result for me is the same, Av.

Please tell me if yours is different and if it is, which firmware do you have. Perhaps there are differences in firmware versions?

Yes, Av will only work accurately wide open or with a lens that remains stopped down (eg M42 mount with adapter) but for a fixed aperture lens such as an f8 mirror that's more than enough!

Cheers,

John

I've just tried to see what happens by setting an A lens to a manually set aperture in TAv mode on my K-5 which is the one that sets auto ISO value. The camera shows Av mode, not TAv. As an M lens would be no different, the K-5 doesn't actually let you use it in that mode!

As said many times above, for TAv to work the camera has to know both the shutter speed and f stop that has been set. If an A lens passed its setting through to the camera body in non 'A' mode then in theory it would work, but it doesn't and was never designed to work that way. Auto ISO will not work with non A lenses.

As regards using the K-5 like an ME, that is setting an aperture on an 'M' lens at anything other than wide open and exposing the picture in Av mode without using the green button first, then it is pure luck if the resultant image is useable. I'd not recommend it for the shot of a lifetime! M lenses need to be used in M mode (or in Av if kept wide open) and the exposure set with the green button.

Bojidar Dimitrov's article on the crippled KAF mount is here: link

John

The one you used to take the photo?

John

Is the lens a little loose when mounted on the camera? That may account for the intermittent contact. If you've not had the lens long consider returning it to the supplier as possibly faulty.

John

If it's an Adaptall 2 mount you may need to clean the electrical contacts on the lens and the actual mount itself as that too is used as an electrical contact.

Well, not Adaptall but still worth seeing if cleaning the contacts helps. Presume other lenses are OK?

John

Has it accidentally come off the 'A' setting?

Mind, I'm just presuming it is an 'A' lens - you haven't said what lens it is or if it had been working OK and just gone wrong or if you have recently acquired it and it has never worked!

John