davidgr1976

I had exactly the same problem as yours in the past (the same jumps). I discovered that the problem was the parallax portable pier I have on the grass ( filled with sand 80kg). With the berlebach tripod disappeared. Now i'm building a concrete pier and retire the portable pier.

Hello, I like very much this piece of software. I always have done PA with drift method since i didn't have polaris view, and I usually leave PA error in some arcsec (15-30"). Now i have moved to another house where I can see polaris but can't point to neither west or east at 10-20 degrees altitude in the backyard. I was considering on buying polemaster but i discovered this. I've been testing it. I get 20" error but when i check it with PHD2 the PA error after 10min is 4 arcmin... What could be the cause of this big difference with sharpcap? Thank you! I haven't thought about pier flexure.... This could be an isue due to the weight in 3 points on the grass (about 110kg?). I am going to put under de bases some wooden parts to avoid pressure n the ground. Thank you very much!.

Hello, I like very much this piece of software. I always have done PA with drift method since i didn't have polaris view, and I usually leave PA error in some arcsec (15-30"). Now i have moved to another house where I can see polaris but can't point to neither west or east at 10-20 degrees altitude in the backyard. I was considering on buying polemaster but i discovered this. I've been testing it. I get 20" error but when i check it with PHD2 the PA error after 10min is 4 arcmin... What could be the cause of this big difference with sharpcap? Thank you!

ok, I will try: 34 mm and 17. (I can't other spacings because I don't have rings for other distances). I will tell you. But this days are cloudy in Madrid.... thank you!!

If the flattener is an skywatcher one, it should be around 55mm. I that sub is around 46mm. I tried with 55 and 60mm and the result is similar or worse....

I think i have a skywatcher flattener ( ibought it second hand with the zs66sd and i doesn't appear nothing except "field flattener"). Here I pic of 600" in h-alfa: thank you!

Hello, I'm going to re-open this thread. I've been testing my ZS66SD with SBIG STF8300M and the stars in the corners are very very elongated. I don't if this is because large chip, flattener, weight of the ccd, miscollimation..... what is your opinion since i can see you have experience with this scope? thank you!