TLR's didn't have a pentaprism
As long as the rays from the lens to the eyepiece are bent by optical
means and you see and record through one lens I would think it's an SLR?.....
even when the lens to sensor passes through the first mirror.

That's the exact problem with the spirit level...... It isn't
Level I mean

Not really a big problem, just test yours on something level
and if it's level with say 2 bars showing, just use 2 bars
when you want to level the camera

I heard from my reliable source that the new update will fix
the spirit level problem once and for all ......
by making the picture format circular

Edit: Might as well shove this in here as well.

There's a new version of PK-Tether out

It also seems that debug mode can be activated on the
K-5

http://www.pktether.com/new-version-0-6-0

No Ricoh, Hoya or Samsung either

2011 Visitor Analysis by main product interest - multiple answers
83.25% said cameras

Time Pentax showed off the NEW Pentax Metallica III

I don't know what to make of this??? About the 6th photo down
on the left hand side.... there's someone shooting with a Pentax
and holding an "Iam Nikon" bag up full on to the photographer

http://www.focus-on-imaging.co.uk/tradestandinfo.htm

Very often it's the lenses that transmit different amounts
of light. Just test each one or use the histogram to set the
exposure.

Can the "Angel of the North" fly?????......
If not it must have been the Solar Panels off someones Roof!

You could always make some cardboard lens hoods

http://www.lenshoods.net/pentax.php

There shouldn't be any problems with IR releases. Some settings
are needed in the camera and the red light should be flashing.

Some of the cheaper remotes have poor battery contacts or very
cheap batteries that don't work too good. The remote also has
to be pointed directly at the sensor.

I've used them on K10D, K20D, K-5 without problems.

For a camera that only has a front IR sensor you could try
a small mirror or an alloy pie tray to reflect the remote
at the sensor.

I loook! them