Our Beautiful Universe - Photos and Videos

[davenn]

View attachment 242856

this and your earlier post...
What are all the large discoloured patches ?

looking at my one ... maybe it's just the way the light was reflecting from "waves" in the surface ?

 

[davenn]

@bruha

" filter is Baader astrosolar safety film 5.0 and I attached photo of filter,. "

the forum is playing up, it wouldn't let me quote that textYes, the same stuff that I use
it's good stuff but as I said earlier, you need to treat it carefully

If you did get the whole sheet ... I would suggest you just redo the filter with a new piece of film

 

[davenn]

Here is the large 360° panorama (resized here to appropriate forum width) which is a combination of 25 photos, ISO 50, f/1.8, but I don't remember the exposure times which for some reason weren't saved in the photo info. There are stars in the picture, but they are only visible in the large photo versions (see photo links below).

love it ... really nice

 

[bruha]

HI davenn
and thank you for answer,,
my photo is filter but from outisde not attached to telescope. -it is not image of sun observing !
Anyway I covered this small middle hole with piece of tape and will see (if will be today sunny ), in other case I will redo it.

 

[Andy Resnick]

Got these over the weekend- the first deep sky objects of astrophotography season (for me): M51 and M101. 2 hours acquisition time on M51, 5 hours on M101 (both 400/2.8, ISO 1000-ish, both 1:1 crops). These images still need some noise reduction and color-correction...

Each full frame shows a multitude of galaxies, I'm especially fixated on NGC 5474 (image is roughly in the center).

 

[Andy Resnick]

Here's what post-processing can do, starting from the previous post: this is a 2:1 zoomed image.

 

[davenn]

NGC 5128 Centaurus A Galaxy
Canon 6D, 400mm EF L lens, ISO4000, f/5.6, 16 x 30 sec lights, 9 darks
Stacked n Sequator, edit in LR ( cropped)
This galaxy is well known for the large dark dust band across the middle of it

Dave

 

[bruha]

Hi
I attach my first image of sun.. there is one sunspot, I attach as well second image (DSC02558) as sample of error dark artefacts whose must be due some scratching or wrinkled filter … ( I have no another explanation)..
Have nice day

 

[davenn]

Hi
I attach my first image of sun.. there is one sunspot, I attach as well second image (DSC02558) as sample of error dark artefacts whose must be due some scratching or wrinkled filter … ( I have no another explanation)..
Have nice day

other than the blobs, a good sunspot capture

OK, wrinkles/waves in the filter film wouldn't produce those artifacts.
I would put money on it being dust on the lens or on the camera sensor
Note how those artifacts are out of focus, indicating that they are closer to the camera than
what you are trying to image ... ie, the sun

Can you please use another camera ( maybe your phone) and take a foto of your imaging setup,
when it is all connected up, so that it shows camera, lens/telescope etc that you are using.
cheers
Dave

 

[davenn]

Last Friday night ( 10 May) our astronomy club had a public outreach as part of the local
botanical gardens "Stars over the Gardens" night.

It was a bit of a variable night, starting nicely as the sun set and the stars started coming out.
A cool wind was blowing that made us all dress up with multiple layers of clothes as the
temperature dropped. About 30 mins after sunset some large dark clouds rolled in and dumped
a shower of rain on us all, causing a scramble for things to cover all the telescopes.

The clouds hung around or almost an hour which, sadly, really ruined the night for the majority of the
members of the public that turned up. Most left, including a few of the club members who didn't think
it was going to get any better but a hardy few astronomers and public stayed around and were treated
to an almost cloudless sky. We were able to point out the constellations and show the small crescent of
the moon and other objects through the telescopes.

As can be seen from the photos, there were a good range of telescopes to look at and through
Schmidt/Cass, Newtonian dobo mounted, and several brands and different sized refractors.

8" S/C and 10" dobo in the foreground

8" dobo in the foreground ( I used to have the same one) and 1 x 100mm and 1 x 120mm refractors
in the b.ground

View from the other direction 120mm (left) and 100mm (right) refractors

My 100mm refractor in the foreground and a 150mm refractor behind it ( both Skywatcher brand)

cheers
Dave

 

[bruha]

Hi Dave and thanks for advice…. yes it sounds logically I will try another camera , but for few next days is bad forecast weather Anyway do you have experience with sun imaging? I mean is better morning , daily or evening sun , and could be possible for example to capture eruption..? (Telescope Devices of your club looks very professionally :)

 

[davenn]

Hi Dave and thanks for advice…. yes it sounds logically I will try another camera ,

I didn't mean try another camera doing the sun images tho that would be interesting

I said to use another camera to photo and show me the imaging setup you are using

Anyway do you have experience with sun imaging?

I have been imaging the sun for almost 50 years

I mean is better morning , daily or evening sun

always wait till the sun is a bit higher in the sky ... then you are imaging through less atmosphere
and the images will be more stable

and could be possible for example to capture eruption..?

No, you won't capture a prominence with a white light setup. You need a Ha solar telescope for that
See my other thread on that subject ... lots of images in there

https://www.physicsforums.com/threads/solar-imaging-and-techniques.925656/Dave

 

[DennisN]

We have clear skies here, and the Moon was in the first quarter, so I took a couple of shots of it with a small monocular scope (about 15 cm/6 inches in length) and my phone mounted together on a tripod:
(still hard to focus due to the mount and due to I used a phone camera)

(ISO 50, 1/50 s exposure/photo, 40 stacked images in RegiStax)

I tried the same with 1/10 s exposure/photo, but that got too bright:

Here's a single image (ISO 50, 1/10 s exposure) which turned out better, probably because a part of the field of view was covered due to bad alignment between the camera and scope:

I also tried filming and stacking, but the results were not as good, but I will continue to experiment with this.

And here's the "miniscope", which I like because it actually provides quite good views of the Moon for the eyes:

 

[bruha]

Hi Dave
I attaching images of my setup and devices. (I though you mean to make image with another camera to check if camera is problem ) Hi and thank you...

 

[bruha]

Hi I attach some sun images from today with one spot and less error dark artefacts (I hope).
Nowadays is here real "april" weather though is may so it is not easy make sun images and night images as well ..:) :(

Have nice days

 

[davenn]

So, a very dirty lens
That's not going to help things ... did you get ALL the marks off ?

use a cotton bud or some very soft facial tissues and some window cleaner
just dampen the tip of the bud or a damp area on the tissue ( don't make it too wet)
Gently wipe the lens
did you check other lenses ... on the scope etc ? the dirty lens you are showing ...
where was that from ?

A much better looking
still a couple of patches of dust fingerprints or something but a big improvement

You just need to increase the exposure time a little bit and check your focussing
Getting the focus right can be tricky and requires a bit of patienceDave

 

[bruha]

Hi, and thank you for advice..
I will make cleaning again and try in next days (forecast for weekend is quite good) (Anyway I have Newton, so no lenses just mirrors -I hope its clear). Concerning exp. time as I have automat. compact camera, it is problem to adjust it but I hope in improvement :):) Thanks and lot of success

 

[davenn]

Hi, and thank you for advice..

keep showing pic's and asking questions
Others and I will happily help

(Anyway I have Newton, so no lenses just mirrors -I hope its clear)

OK, That's right, I had forgotten which type of scope ( old age and failing memory)

so look down the tube and make sure there are no dirty patches on the main mirror
Take the eyepiece out and look through the hole and you should also be able to see
if there is any gunk on the secondary mirror

Concerning exp. time as I have automat. compact camera,

OK, can you give me the make and model and I will google it and see what it's spec's are Dave

 

[bruha]

Hi Dave and
hank you again.. Yes My camera is: SONY DSC WX350 (there is P AUTO where apperture and shutter speed is set automatically...(maybe to try changing ISO or exp. compenzation..?).

 

[davenn]

Yes My camera is: SONY DSC WX350

Thanks, I'm having a read

 

[bruha]

Hi I attach some new sun images (now there was not any sunspots-it is just error artefacts) I try with ISO 100,1600 and exposure sompensation -2 and 2. Exp time was varying from 1/50- 1/400.

Have nice days

 

[bruha]

Still two...

 

[davenn]

Hi I attach some new sun images (now there was not any sunspots-it is just error artefacts) I try with ISO 100,1600 and exposure sompensation -2 and 2. Exp time was varying from 1/50- 1/400.

Good continued attempts
unfortunately there's still lots of dirt/dust marks. And as you say, none of the "spots" are actually sunspots
I think you need to figure out a better attachment of the camera ( or as I suggest below ... a better camera
more suitable for this sort of imaging) to the scope so that you see the full disk of the sun so that you can
avoid this sort of thing ...

I looked through the user manual for you camera and yeah, not really a suitable camera for this sort of activity.
The lack of being able to do any sort of manual control the camera focus etc, is seriously limiting what you can
achieve and it means that trying to get an image with decent focus is pretty much impossible.
I can now see why it has always been a struggle for you in your past images you have posted.

I would highly recommend buying a DSLR camera, one that the lens can be removed and you can then couple
the camera to the scope with a T-ring adaptor ( think I showed you one before?). Then you are going to see
a huge improvement in your astro imaging. I can promise you, the effort and cost will be well worth it !

Doesn't have to be a new camera ( you may not be able to afford that??) Go to second hand shops, or camera
shops and see if they have any trade-ins. A good chance you may pick up a Pentax, Canon or a Nikon quite cheaply... several 100 euro. probably something very respectable for less than 400 euro.

Honestly, it's what you need to do if you really want to advance way beyond the very limited capabilities of
that camera. For daytime family / holiday snaps, it's ideal but for astronomy imaging, not goodcheers
Dave

 

[bruha]

Hi Dave and thank you for evaluation and advices. Ii is true and I will look for this type of DSLR camera(-I now this attachment but I can not buy new one now) . Concerning focus I have two Hyperion eyepieces , 8 and 5 mm
while with 5 one whole sun disc can not fit to view and with 8 one it just fit without any reserve space around-as S6 image). With DSLR camera connected you can zoomed and anti-zoomed ?
Thank you again and have nice day

 

[davenn]

Hi Dave and thank you for evaluation and advices.

You are welcome ... Keep posting and people here will help where we can.

Ii is true and I will look for this type of DSLR camera(-I now this attachment but I can not buy new one now) .

That's OK ... as I said, you may find a good condition second hand one ... keep looking around
Unfortunately I have already given away my 2 spare Pentax cameras, else I could have sent you one of them
to get you up and running ... look out for a Pentax K7 or K5 ... the K5 is the newer model of the 2 of them, it came out in ~ 2011

Concerning focus I have two Hyperion eyepieces , 8 and 5 mm
while with 5 one whole sun disc can not fit to view and with 8 one it just fit without any reserve space around-as S6 image).

you should try out around 20mm ... it would be great for nite-time use as well ... my most commonly used eyepieces for
nite-time astronomy are the 40mm, 20mm, and the 15mm

With DSLR camera connected you can zoomed and anti-zoomed ?

When using a DSLR camera, there is no lens on the camera and no eyepiece in the telescope.
Essentially, the telescope is being used as a BIG telephoto lens.
Focussing is done by using the focusser knob on the telescope. This is why it is so much easier to get focus
Dave

 

[davenn]

A blast from the past, 16 March 2016, LMC (Large Magellanic Cloud) and Comet 252P/LINEAR
Canon 6D and 70 - 200mm EF L Lens @200mm
20 x 30 sec exp, ISO 1600, 15 darks, no flats or bias
stacked in DSS edited in Lightroom

 

[bruha]

Hi Dave,
it is beautiful, as I understand, it is stacked from 20 images with 30 sec . exp time each? and without telescope,
just with camera? Anyway Thanks, I will try with 20 and 12 mm (but thes ones are not hyperion, just ordinary small eyepiece -not fit so good to camera objective...I Will see , and here is still one sun image (better fitting again without spots...) Have nice days and evenings..

 

[bruha]

Hi and thank you...
I understand, but DSLR camera really without eyepiece..? I saw on picture this arrangement but with DSLR camera -body attached by T ring to Hyperion eyepiece... thank you again and I will look for these models...:):)

 

[davenn]

it is beautiful, as I understand, it is stacked from 20 images with 30 sec . exp time each? and without telescope,
just with camera?

Yes, that is correct, just camera and good telephoto lens

and here is still one sun image (better fitting again without spots...)

A lot better, it would still be good to find and remove those dust etc blobs from mirror, eyepieces ..

I understand, but DSLR camera really without eyepiece..?

Yes
It's the way 99% of people do their astrophotography

I saw on picture this arrangement but with DSLR camera -body attached by T ring to Hyperion eyepiece

Yes, that can be done, it's called eyepiece projection ... a it gives a bit more magnification
but at the cost of some sharpness, as there is more glass ( lenses) in the optical train
for the light to pass through

Have nice days and evenings..

you too Dave

 

[bruha]

Hi Dave and thank you for answer, I understand and will try it at first oportunity :) (unfortunately this week should be cloudy and rainy here :(