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Forum przeniesione na www.rnavspotters.pl/forum Forum RNAV polish spotters
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contrailsUK
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Wysłany: Pią 18:25, 23 Lut 2007 Temat postu: Set ups |
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Hi,
Not sure if this topic has already been created, but I thought it would be a good idea to show each other our set ups and how we are taking our photos. This way we can help each other solve problems that occur when taking photos.
I am having trouble finding a good way of attaching my camera to my telescope, so I wondered if anyone could help?
here is my setup:
Canon 350D (setting 'M' on 400 or 500) T-ring Telescope eyepiece
Canon 350D:
Celestron Starhopper Telescope:
Attatching the camera to telescope:
Camera attatched to eyepiece of telescope:
I am having trouble with keeping the camera still as I have to hold the camera over the eyepiece, also it is hard to keep the camera clean inside, because it is exposed to the air so dust is getting in the sensor and mirrors.
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grztus
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Wysłany: Nie 19:46, 25 Lut 2007 Temat postu: |
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Hi ContrailsUK,
great idea about this topic!
I don't have any photo of my equipment now, but I'm using it in a little different way: Synta -> T2/EOS (with 2"->1,25" reduction) -> Eos 350d.
Like you see, I'm not using an exepiece, so I don't have any problems with handling my camera during taking a pictures. Of course I have the same problem as you with the dust. I'll try to add some photos next week.
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contrailsUK
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Wysłany: Czw 23:37, 01 Mar 2007 Temat postu: |
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Hi,
Interesting set up grztus. I have tried using the telescope without an eyepiece, but I cant focus the scope on contrailing aircraft. I can only focus on things which are no more than 100m away. It seems strange as our telescopes are very similar. My knowledge of photography with telescopes isnt very good so I have a few more questions to ask:
Are you taking pics through any lens or eyepiece at all?
You say you use a reducer, is this helping you focus on the aircraft?
BTW, your emirates 777 pic is very good, congratulations on getting the peoples choice award on jetphotos!!!
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grztus
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Wysłany: Pią 2:18, 02 Mar 2007 Temat postu: |
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I cannot take a photo, so I've tried to draw it
- blue - focuser
- red - 2"=>1.25" reducer
- green - T2/EOS reduction
I've tried to keep some proportions: the focuser is pull out at about 5 milimeters (and it's very similar type to yours), 2"=>1.25" is a reduction from the Synta's kit (it has maybe 2 mm) and the T2/EOS is about 2mm thin.
[link widoczny dla zalogowanych]
My friend have the Celestron 114 scope (900mm/114mm) with 1"25 focuser and he couldn't focus infinity with Nikon so he have cutted few milimeters of his focuser and it's working now
I'm not using any exepiece or lens to focus my Synta on airplanes.
2"=>1.25" don't help me to focus, it don't have any influence on my photos.
I can't find any photo of T2/Eos reduction, but it's very similar to M42/Eos like this one:
The difference is only inside: thread of T2/Eos has about 37mm (1.25") and M42/Eos has 42mm. By this thread you connect the camera and 2"=>1.25" reduction (which is connected to Synta scope).
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contrailsUK
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Wysłany: Pią 9:51, 02 Mar 2007 Temat postu: |
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aaaaaaaah now I see!
I thing my t-ring is too big, so the camera isnt close enough to the focuser of the telescope. Ive just had a go with taking a pic, it seems to work now
Its going to be hard to get used to the image being the right way up after so long of looking at upside down planes
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grztus
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Wysłany: Śro 15:54, 25 Kwi 2007 Temat postu: |
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Last few days I have received an e-mail from our Belgium friend. Becouse I cannot send him a reply message (the server is returning some problem with his e-mail adress) I will give my answer here, hope that Stef sometimes are visiting our forum:
Here is the message from Stef:
Cytat: | Hi,
I'm Stef from Belgium and am taking for quite some years contrail pictures.
Recently, switched to a 8" Skywatcher and am experimenting with a short barlow 2x lens of TAL which goes straight into the tube without eyepiece.
Seems when using the barlow, I get always a brighter spot in the middle of my picture, this due to the spider vain (to hold the secondary mirror).
I wonder if you encounter the same problem when using your barlow, so pls check the picture in attach: any feedback welcome.
Regards, Stef |
There was one photo in attachment.
And here is my reply:
Cytat: | Hello Stef, nice to meet you!
Nice photo of Austrian, the number of details and sharpness are really
great!
There can be few reasons of problem you have wrote about, the spider
vain can be one of it. In my Synta 10" I have a standard four arms
secondary mirror holder.
I was looking for brighter spot on my photos with and without barlow,
and I didn't found it.
In my scope the focuser have 2" diameter and the Soligor Barlow
has also 2" diameter - it's giving him 38mm of active diameter, in 1.25"
barlows it's about 24mm. And the CMOS/CCD sensors have usually about
22x15mm dimension. So if you are using 1.25" barlow one of the reason of brighter scope can be an active diameter of barlow lense: picture near
the edges of focuser are quite darker than in the middle, and
the 1.25" barlow can amplify this effect on the edges of it lense.
The other reason can be the black quality of your scope fuselage (I'm
not an astronome, I don't known technical language from this area ).
It's mean that inside the tube of our scope there is need to have near
ideal black walls, but in my scope walls are dark, but not black (it's
about 70% grey). That's why the contrast are lower and the whole picture
is brighter, so even if I have the same effect (brighter spot in centre)
I cannot find it on my photos.
Best regards,
Grzegorz Tuszyński |
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contrailsUK
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Wysłany: Śro 17:47, 25 Kwi 2007 Temat postu: |
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Yes, Stef is on [link widoczny dla zalogowanych]
I have informed him of this forum
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grztus
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Wysłany: Śro 19:27, 25 Kwi 2007 Temat postu: |
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Thank you ContrailsUK, I was wondering if you know him.
If you have any contact with, please let him know about my answer.
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contrailsUK
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Wysłany: Śro 20:01, 25 Kwi 2007 Temat postu: |
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I have sent your reply to him on the luchtzak.be forums.
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contrailsUK
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Wysłany: Nie 20:46, 29 Kwi 2007 Temat postu: |
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Hi, Grztus, I have noticed you have taken pictures of the sun, and therefore have a solar filter. I just wanted to know what kind of filter you are using as I am thinking of getting one.
Also, Stef says thanks very much!!
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Wysłany: Czw 2:41, 03 Maj 2007 Temat postu: |
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For this kind of spotting I'm using a solar foil [link widoczny dla zalogowanych]. I have bought it with telescope. I was thinking of getting also some special solar filter to it (H-alpha or Solar Continuum), but they are a little expensive for me, so I'm using only this Baaders foil.
Of course you need to get as many foil, as your telescope diameter, becouse you must mount it behind the telescope tube (not in the focuser ).
On Monday I have seen the ISS station with Sun in background, I was ready for this with my camera, but the transit was really short and I was late with shutter button... When you will have your foil, check [link widoczny dla zalogowanych]
Of course you will need to synchronize your clock, I'm using [link widoczny dla zalogowanych].
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contrailsUK
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Wysłany: Czw 8:00, 03 Maj 2007 Temat postu: |
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Hi, I have gone for the cheap option and chosen baader planetarium astrosolar film (comes in A4 size), which is sort of like yours, except you have to build the filter yourself. I too was thinking of getting a h-alpha filter, but I also need to save up
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Wysłany: Wto 18:35, 15 Maj 2007 Temat postu: |
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Hello,
My solar filter has arrived and is up and running.
I have managed to have a look at the sun and took a picture:
[link widoczny dla zalogowanych]
I have also edited the photo to give it a more sun like effect. Maybe not as interesting as it would be with H-alpha, but its great to see the sunspots
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Wysłany: Wto 18:59, 15 Maj 2007 Temat postu: |
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Nice photo, better than mine. I have a problem with waveing of warm air and the image isn't sharp
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Wysłany: Śro 22:14, 16 Maj 2007 Temat postu: |
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Thanks, Im not an expert on viewing the sun but your waves may be because of various reasons. My guess is that your telescope is on a roof, or balcony and heatwaves are rising off this. My telescope is on a Balcony, however the sun at that time of day wasnt very powerful and the balcony floor wasnt very hot. Perhaps when you took your photo the sun was more powerful creating a large amount of heatwaves to pass in front of your field of view.
Maybe you coluld try taking your telescope in the garden?
Anyway I hope this helps
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