Atreta

Hi Frank

You obviously have coma which doesn't help. To image unguided you need your PA and balance to be spot on. I'm not sure where M45 appears in the sky for you? That might make difference.

Louise

It was in north, need to check where it where that night to give precise information., but i thought if one sub was about ok, the rest should be too. The coma is really obvious, gonna try the cc when i get back home. Can't wait for the finder to arrive.

Sent from my XT1069 using Tapatalk

uranium, 

no, it is unguided, the 9x50 finder haven't arrived yet.

the image was shot without the cc, sky was cloudy all night and about 2 a.m it cleared so i went to image a bit.  i need to give the cc a go one of these days.

do you have any idea about the random trails? this is how it is:

the above one is ok for me, but then i get something like the one below all the time

thank you.

this is my latest attempt with the 130 pds:

m45, 36x30s subs. no flats, bias or darks.

i'm having an issue with my mount getting unusual tracking problem with my mount that's disheartening me, i drift align it, get some good subs with minimum trail, but then after a good one comes another one with trails, a good one and a bad one, not in order but very often.

what could it be? guess i'll make a topic about it with some pictures.

thanks

thank you , uranium.

no problem, you helped a lot

i'll try it with the m48 to t2 and the t2 ring to see how it goes.

we are in lack of astro stuff in the stores here.

cheers

forgot to say in the previous post that it did come with this adapter to t2 ring. it will still need spacers, right?

i'll try to find here in brazil the adapter you mentioned, as FLO doesn't send to here.

thanks, uranium.

another thing to place in the buy list

good news, my coma corrector and guide camera arrived today, the bad news is that(as always) it's cloudy tonight.

i don't have any spacers to use with the corrector, what can i use instead? it's a gso coma corrector.

btw, is there anything i can do to test both while it's clouded?

thanks

Wow, you guys are really getting on well with these little newts, im on my second one and cant even get it to focus a 1.25 ep (just like the last one)

Have you tried an extension peice?

Sure I read that else where where a member was using an eye piece they needed a 2 inch extension.

i made a post here when i tried to use the 28mm 2" eyepiece and couldn't focus. Louise told that it was needed to use the supplied 2" extension tube to focus it, and then it  was ok.with the 1.25" eypieces i had no problems focusing at all, just used it with the 1.25" adapter and without the extension tube. there is a picture of it in a post i made in this topic. here is the link:

http://stargazerslounge.com/topic/210593-imaging-with-the-130pds/?view=findpost&p=2600440

I doubt that a CNC machining could be directly used in color filter removal. Tolerances are so small (and/or the cost of such precision machine would be sky high).

However, use of the CNC like machine in slowly polishing the surface would be a whole another idea.

that was what i meant.

this may be a daft suggestion, but has anyone tried putting the wooden scraper inside a spring loaded biro pen or something similar? that way it would be much harder to put too much pressure on the cmos surface... just a thought.

i thought about something like a micro lathe that would automatically scrape from a fixed(programmed) starting and end position.

don't know if there is such a thing though.

Frank

Need to spice up this thread with another galaxy image   NGC 4565

88x60s subs unguided on EQ5 Pro. Image data from two nights in March 2015.

NGC4565Proc2_cropped.jpg

i was going to ask how long unguided exposures could be achieved with an heq5, but your post somehow answered it for me, you must get really good PA.

i was able to get 30s max, gonna try improving my drif alignment.

Frank

thanks, Jim

i guess you can get a similar result, how's your LP?

i'll try taking a short exposure to show how it is in here, it's ok mostly to the south and east too, but north and west is much more light polluted.

please post your results when you take them.

Frank

back to the lagoon

this time it was at almost the zenith and i think the LP was much lower where it was.

54x30s subs, again no calibration frames.

this is a crop to cut the coma around the corners.

Frank

fantastic achievement,, tom and olly.

very inspiring.

Frank

If you do get a cc then it might be better to get a non-reducing one as the reducing ones e.g. the Skywatcher seem to have the side effect of causing the focus tube to protrude too far internally... This has cropped up several times on other threads recently. It results in one side of the stars being flat sided.

Louise

I took a visit to the site of a brazilian store and they sell this GSO coma corrector: http://agenaastro.com/gso-2-coma-corrector.html

is this a good one? as you said this one won't have any reducing effect.

thanks again,

Frank

Awesome picture, is it still visible?

Hiya

That's not bad at all Not sure why it wouldn't plate solve but obviously you need to get a coma corrector at some point. You've picked up some nebulosity too which is better than I can do with 600s subs!

Louise

Thanks, i figured why it wouldn't plate solve, i tried to place the camera perpendicularly to the scope, i rotated the picture 90 degrees CW and it plate solved almost instantly.

I think i'll have to buy the coma corrector sooner than i thought

Frank

This is my first attempt with the 130p-ds.

I was trying to image the southern pleiades but i'm having some difficulty with the new scope as i was used to use only the camera to image with.

Did a try to plate solve it with astrometry.net but it failed.

here it is:

60x30s  @iso 800 subs, roughly drift aligned

no flats, bias, darks.

Please comment what you think.

Frank

Hi

I think you need to use the supplied 2" extension tube to use it with a 2" eyepiece. You should then be able to focus ok.

Louise

Thank you, Louise

it worked with the 2" extension tube

I gave the scope a try today with a nearby mountain here but i couldn't focus with the supplied 28mm 2" eyepiece

With the 1.25" eyepieces i had i was able to focus easily, could it be because of the distance of be subject?

Jules,

Here it is

Is yours different?

Finally i mine 130pds arrived.

But as always sky is cloudy and a bit of rain too.

can't wait to try it out.

I've had mine for nearly 6 weeks but not had a chance to use it yet!! I'm going to set it up with a solar filter tomorrow in preparation for the partial solar eclipse on the 20th March I'm sure you'll enjoy imaging with yours

Louise

please post when you catch it, it won't be visible here.

the 130p-ds will be a great fun and i'll keep using the 114p for visual with my little niece, an astronomer in the making

I can't wait for mine to arrive.

Hope it doesn't get stuck in customs here

Hi

They have different names over the pond i.e. BKP 130 DS. This is the site in Canada:

http://ca.skywatcher.com/_english/01_products/02_detail.php?sid=336

It's probably better to use a coma corrector - depends how ambitious/fussy you are with your images!

There appears to be a Brazilian deler: http://armazemdotelescopio.com.br/loja/index.php/telescopios but doesn't specifically list a 130pds. Maybe they can order one in for you?

Louise

Thank you, Louise

Didn't know they had different names. Gonna make a search fo it.

that brazilian site you gave me is the store i bought my current telescope and it's a very good store, i contacted them but they don't sell it and are not importing at the moment.

For the moment i think i'll pass on the coma corrector right now as i'm still learning, maybe later when i get more demanding