Originally posted by 2old4toys ...
2) allows longer than 2s exposures (up to 30s !) and bulb mode for 30s exposures.
...
.
0.666 Devil's Speed Booster 4 Pentax Q... + Mechanical Shutter !
Note:
0.666 Devil's Speed Booster 4 PQ to Nikon F will do the job as well
.
This would be Very Useful for Astro-Photography...
the SkyWatcher 254/1200 is a very affordable Excellent f/4.7 Newtonian...
with 0,666 Devil's Speed Booster 4 Pentax Q it would become
2.8x 1200mm =
~3360mm at f/2.4 to
Overcome the 30 sec. limitation of the Q !
Even if lowering the ISO setting down to ISO 800 !
- all my Galaxies & Nebulae were shot with the Q10 at ISO 1600 at f/5 :
Photos tagged with "iso-1600": Galleries: Digital Photography Review = geo444
which is a little too much to avoid the +30sec-LENR* when Temperature is over ~24°C
+30sec-LENR = in body Dark Frame subtraction
No Need to implement a Physical Mechanical Shutter inside the 0.666 DSB4PQ...
just make believe the Pentax Q "
there is a Mechanical Shutter in the 0.666 DSB4PQ",
because for Astro-Photography there is No Need of a Physical Mechanical Shutter...
but just : Start / Stop Exposure... Build Raw File... Write Raw File on the SD card !
In fact, make believe the Pentax Q "
there is a Mechanical Shutter in the 0.666 DSB4PQ",
just means (x?) Electronic Contacts that respond with the Correct Voltage when required
Who has some knowledge about the Protocol between the Body and the PK-Q Adapter ?
- just for the specific part "
is there a Mechanical Shutter in this Adapter" ?
what do you think about that 2old4toys, AstroDave, Mikesul, Barondla, others ?
an affordable ~3360mm at f/2.4 for our Pentax Q ?