Here is an (old) official manual for the "SMC Pentax-F AF Adapter 1.7X":
http://c758710.r10.cf2.rackcdn.com/files/support/manual/275_1314744958-112672920...
(via http://www.us.ricoh-imaging.com/support/download-details/275 )
"In the case of a lens faster than f/1.7, the compund maximum f-stop becomes f/2.8"
There are also some interesting details about the range of focus.
This adapter is very useful with e.g. MF 300/2.8 lenses.

Just e.g. google "water damage camera covered by warranty" (irrespective of manufacturer).
A very recent example: http://www.sammobile.com/2013/07/31/water-damage-not-covered-in-galaxy-s4-active... (even with IP classification: https://en.wikipedia.org/wiki/IP_Code )

There might be a discrepancy here between advertising and reality.
However, there is also a difference between "waterproof" and "weather-resistant".

From the manual:

"All PENTAX cameras purchased through authorized bona fide photographic distribution channels are guaranteed against defects of material or workmanship [...] Service will be rendered, and defective parts will be replaced without cost to you within that period, provided the equipment does not show evidence of impact, sand or liquid damage, mishandling, tampering, battery or chemical corrosion, operation contrary to operating instructions, or modification by an unauthorized repair shop."

["Vermeiden Sie Kontakt mit Müll, Schlamm, Sand, Staub, Wasser, toxischen Gasen oder Salzen. Sie können zu einem Ausfall der Kamera führen. Wischen Sie etwaige Regen- oder Wassertropfen an der Kamera gleich ab. [...] Die Gewährleistung erlischt, sobald ein Fremdeingriff, unsachgemäße Behandlung oder Gewaltanwendung vorliegt."]

Note that this discussion is not new.
See e.g. http://www.dslr-forum.de/showthread.php?t=1057249 and http://forum.digitalfotonetz.de/viewtopic.php?t=93793

There seems to be no guarantee whatsoever if damage by water occurs.
Though, the probability of such a damage might be lowered by the seals.

E.g. washing the body with or even under water - as shown in some movies - is risky and not covered.
Water can also get in the body, if e.g. air is sucked in or a component is hit by rain at a certain position:
K5 air sucking: http://www.youtube.com/watch?v=dv3gBca3ymg
PU weatherproofness: https://www.pentaxuser.com/forum/topic/testing-k-5-weatherproofness----35949/p-0

http://www.dslr-forum.de/showpost.php?p=9990173&postcount=137

Last chance: 249€

Have you tried to use an IR remote?

bmk now offers a reward for the recovery of his stolen equipment:

http://forum.digitalfotonetz.de/viewtopic.php?t=100029

Obviously, you misunderstood something .
You usually get lynched every time you mention it .

In my favorite German Pentax forum the member bmk reported that some of his equipment was stolen out of his car:

http://forum.digitalfotonetz.de/viewtopic.php?t=99916

FA* 400/5.6 (#3810581)
DA 14/2.8 (#5822607)
K-5 (#4234780)

If somebody can give relevant information on the whereabouts of one of the articles, please contact me (or bmk through the above link).

Especially, reports of any sales of an FA* 400/5.6 are welcome.

Hi,

SDM is known to cause some problems sometimes. However, the DA* 200 is not the most likely candidate for this issue. Concerning Switzerland and your problem, the German forum http://forum.digitalfotonetz.de/ could be of help.

Regards,
froeschle

Remembering this thread, I just stumbled across this
http://www.ebay.co.uk/itm/330941408476

and the more reasonably priced alternative
http://www.ebay.co.uk/itm/310675719835



PS: No, it is not the most expensive lens hood, see e.g. http://www.dpreview.com/forums/thread/2292485