There is an official Pentax video on the cal procedure somewhere, I will try to find the link. My advice would be to do the cal then the fine cal for the astro function on site and make sure that you are well away from the car or other magnetic objects as they will affect the accuracy of the compass. I started out feeding it with Lithium batteries but have since moved on toe AAA Eneloop cells, they do discharge when the unit is "off" but I've never checked parasitic drain current or taken detailed notes on battery life, I just fit a new battery when the warning indicator shows.
On 13 September 2013 12:55, Darren Addy <[email protected]> wrote: > Yes, I've read about the battery issue. It sounds like it draws > battery even when it is off. I've got rechargable AAAs, so I will just > plan on starting with a full charge any time I plan on using it. I > haven't heard anybody say that they run out before a night's session. > > I have a theory that the "precise calibration" can be pretty important > and I have a plan to make mine VERY precise. It involves turning a > bowling ball into a large ballhead for the "precise calibration" > process. I plan on experimenting with the amount of time to move in > each axis (you have up to 20 seconds for each of the three axis). I > have the feeling that a lot of people do it too fast or inaccurately. > I've also heard that people got better results when they upgraded to > the latest camera firmware. > > My "hero" with the O-GPS1 (and a K-5, now K-5 iis) is a frenchman, > Stéphane Poirier. His stuff is amazing. > http://poirierstephane.free.fr/photos/index.php?/category/132 > > They are made from a "stack" of shorter exposures. He uses the DA* > 200mm f2.8 and says that the O-GPS1 will give you 30 sec to 1 minute > exposure times with that focal length (depending upon the declination > of the object). > > On Thu, Sep 12, 2013 at 7:14 PM, Rob Studdert <[email protected]> wrote: >> On 13 September 2013 08:09, John Celio <[email protected]> >> wrote: >> >>> I've used my O-GPS1, but I find it really unreliable in terms of it >>> finding a GPS signal in a reasonable amount of time. When I took it >>> around southeastern Australia in 2012, I'd have to wait five or more >>> minutes for it to get things figured out, and it's only slightly >>> faster here in California. Although I still carry it in my kit, I >>> rarely use it these days. The one time I tried the AstroTracer >>> feature, the results were pretty bad. Overall I'm not super impressed >>> with it. >> >> When it works it seems pretty good but it does take an extraordinarily >> long time to lock sometimes (noticeable when the phone takes seconds) >> and it's really touch on batteries too. >> >> -- >> Rob Studdert (Digital Image Studio) >> Tel: +61-418-166-870 UTC +10 Hours >> Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio >> >> -- >> PDML Pentax-Discuss Mail List >> [email protected] >> http://pdml.net/mailman/listinfo/pdml_pdml.net >> to UNSUBSCRIBE from the PDML, please visit the link directly above and >> follow the directions. > > > > -- > Nothing is sure but death and Pentaxes. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- Rob Studdert (Digital Image Studio) Tel: +61-418-166-870 UTC +10 Hours Gmail, eBay, Skype, Twitter, Facebook, Picasa: distudio -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
