Look no rings !!

[Dave Smith]

That is Newton's rings. It has been nearly a month since doing any imaging due to holiday, visitors and cloud. Today, 21 August 2015 I finally saw the Sun and was able to image.

I have had a lot of problems with Newton's rings and some will remember that David Rose of Rowan Astronomy very kindly loaned me his prototype tilt adapter which worked great. I now have the production version and this is the first opportunity that I have been able to try it out. I set the angle to about 3 degrees as that worked for me before and hey presto NO SIGN of the rings. Brilliant.

Here are my images from this morning using the adapter. The first two of proms had no flats applied but the one of AR2403 did have flats (but no sign of rings on them).

Finally here is the arrangement that I use.

Dave

[tonylumley]

nice Dave, one day, I would love to achieve  your level and skills, Lum, Southminster.

[xtreemchaos]

great images Dave,lovely detail,glad you have sorted the ring problem. thanks for posting. charl.

[Ibbo!]

great news I hope the dreaded NR's are banished for good

lovely images

[Tonynexevo925]

Amazing images - the second image is stunning.

[sooot]

great image to start back with

[Zakalwe]

Where might one purchase one of these fine implements?

[Davey-T]

Excellent images Dave, wondered where you'd gone

Dave

[Dave Smith]

Where might one purchase one of these fine implements?

http://www.rowanastronomy.com/productsa4.htm#tiltadaptor

Dave

[keramos]

Excellent Dave, I've taken a few shots with ASI174MM and get a whole lot of NR, I've ordered mine from Rowan Astronomy hoping to recieve it soon.

Now do you know how to get rid of this aweful weather??

Nihal

[michael.h.f.wilkinson]

Great work. Lovely images.

[Dave Smith]

nice Dave, one day, I would love to achieve  your level and skills, Lum, Southminster.

Thanks Tony, I see you are just down the road from me

great images Dave,lovely detail,glad you have sorted the ring problem. thanks for posting. charl.

great news I hope the dreaded NR's are banishing for good

lovely images

Thank you. I'm sure I have now seen the last of NRs

great image to start back with

Thanks Craig.

Excellent Dave, I've taken a few shots with ASI174MM and get a whole lot of NR, I've ordered mine from Rowan Astronomy hoping to recieve it soon.

Now do you know how to get rid of this aweful weather??

Nihal

You won't regret your purchase.   Sorry can't help with the weather

Excellent images Dave, wondered where you'd gone

Dave

Thanks Dave. Scotland for two weeks with plenty of rain but also some Sun in the second week.

Great work. Lovely images.

Thanks Michael.

Dave

[Stub Mandrel]

I feel very nervous saying this, especially given the excellence of the bottom two images, but the top one looks like a 'double exposure' could it be reflections or just a stacking error?

[Dave Smith]

I feel very nervous saying this, especially given the excellence of the bottom two images, but the top one looks like a 'double exposure' could it be reflections or just a stacking error?

Not a problem. I don't think there are any stacking errors, that is how it was. I've just played the video again and anything that looks doubled is actually there.

Dave

[Luke]

Very nice work Dave and even better you have nailed the rings.  I'll go the AR for my fave, sweet! Love the flaring, very nicely captured.

Our sun is so awesome!

[Freddie]

Looking good. Yes, those tilt adaptors are so useful.

[laudropb]

Great images. Glad your Newton ring problem is solved and look forward to seeing more of your work.

[JamesF]

Some stunning proms there.

James

[dazzaa1966]

Fantastic proms Dave.

[1parsec]

Excellent set of images Dave.  It's great to see the tilt adaptor has fixed your Newton Rings.

[Pete Presland]

Well done for sorting out those rings and an excellent set of images to show for it.

[Dave Smith]

Thanks all for the comments. It is much thanks to Dave (1parsec) for designing such an effective device which eliminates those pesky rings.

Dave

[Stub Mandrel]

Not a problem. I don't think there are any stacking errors, that is how it was. I've just played the video again and anything that looks doubled is actually there.

Dave

I'm sure you're right - the human brain does have a strong habit of discovering patterns where there aren't any. I still like the middle one best though!

[Zakalwe]

I've ordered one of these doobries too. Thanks for the report Dave.

My ASI 174 suffers from NRs and banding. Flats normally sort out the NRs, but the banding causes a bigger problem as the bands can cause areas to overexpose. Flats can't recover that type of problem.

[Zakalwe]

^^ A flat field before fitting the tilt adapter


^And after fitting it.

And here's my Quark imaging train now that I have a fully threaded connection:

ASI 174 mounted on Rowan Astronomy tilt-adapter, fitted to a FLO T2 thread adapter into the Quark. The Quark is then mounted onto a JTW Astronomy barrel (courtesy of Mark Woodward) and then screwed into the focuser. Finally, I know that the Quark is solidly mounted and orthogonal...I hate clamping screws with a passion!