It's a high quality prime lens from the A series. Manual focus, quite a large front element, covers the full 35mm film frame.

It replaced the M series 20mm f4, also an excellent lens.

Calm down and carry on seems a good message just now. We do get excited sometimes about things which are not worth getting insulting about.

We're not here to mark posts as though they were mini-essays....

Yes, if 30% of the light is lost to the viewfinder, then the exposure to the sensor would be reduced. But we need the exposure information to be correct and comparable to other cameras and meters, so it needs boosting up to make the exposure the same as it would be without the light loss.

Of course, all things are not equal, and it so happens that pentax in-camera processing seems especially good. So the advantage lies with the Pentax range in many respects.

Annoying though it may be for many, incorrect speeling is not the end of the world if the meaning is still clear. Not everyone is fluent in English.

However, it is also fair to say that if we wish to express ourselves clearly then good spelling and good grammar will help enormously.

Lens has been the correct spelling in English for a very long times. lenses is the plural.

Again a caveat though. In 1850 "finished" was spelt "finisht" so correct spelling can change with time.

I would expect the K-3 as anticipated above, if it had the same sensor as the A77, to perform better in terms of ISO/noise.

The reason is that SLT camera lose 30% of their light to the EVF, meaninf they need more amplification to give the same exposures. Therefore, noise will be higher, all other things being equal.

It's only necessary to post once and having two threads is confusing. We get two sets of replies.

I'll close this one off so we can concentrate on the other one.

Best regards

John

55mm f1.4 lenses are unusual for full frame, as 50mm is more commonly used.

However, on APS-C, 55mm is pretty close to the traditional film lens, the 85mm f1.4, so clearly it is intended for the same purpose.

IIRC there is a "Finish" button to complete the process.

There is a camera fair near Derby this weekend, so it might be worth a visit there if you are close enough.

I don't think you'll even be close, but to double check you could have a search through the completed auctions on eBay.