Hi, I am hoping someone on here might be able to help or advise what this image is that i am seeing through my scope.
I have just got a delivery of a brand new Skywatcher Evostar 150 ED
I was just going about a few things checking it out.
I am completely new to these scope as i have always been using a Dobsonian.
I put a diagonal on and had a quick look through it and found what i thought was a smudge mark,
Thinking it was in the diagonal i tool it off but that was clear.
Then just looking straight through the scope i could still see it.
Thinking it was something on the front of the lens, had a look but all clear.
It appears to be inside of the scope.
I have attached a photo of it in the hope someone might be able to tell me what it is before i contact the company i purchased it off in Australia.
( Sorry first time at trying to attach an image on here )
To help explain the image a bit, the grey is just a background to help show the defect in question.
What i am asking about is the triangles that you can see,
What are they?
Is this normal?
Is there an issue with the scope that i need to send it back?
Looks like a reflection from something outside the scope. Try looking at a bright star at night; defocus a little - if the rings are concentric/centered then it's probably all good.
The only fault that's likely to occur is that the collimation is knocked out during shipping and even that is pretty rare.
Thanks for the reply,
Yes only came across it by chance really.
Have moved it around inside the garage here and the image stays in the one spot.
Just looks very odd as the triangle shapes are fairly precise regardless on where the scope is pointed in the garage.
Will be a while before it gets a change to get outside unfortunately, stormy weather here for a few days.
Would't even know where to start with colimation on these scopes, no book work came with this scope either.
Yes, i was hoping that, but no lights, even when moved 180 degrees the other way i still get the same exact image,
The gray you see is only a light background i found to highlight the suspect image a bit better.
It does look like a reflection, is this with the dew shield fully out?
It is unlikely that the collimation will be out and it won't cause this kind of issue anyway. A star test will tell you whether there is any collimation issues but they're doubtful and unrelated to this.
If you're rotating the OTA and the reflection rotates with it then it could be coming from inside the lens cell; a reflection off of a spacer or something.
Thanks again for the reply,
In regards to when i rotate the scope, the image is always in the same
spot / area of the scope, it doesn't appear to rotate around inside if that makes sense?
Now things is a tad embarrassing, but you mentioned is this with the dew shield fully out?
I didn't even know i could move the dew shield in or out, just had a look and it appears to be permanently fixed, dose that sound right?
The scope is the Skywatcher Evostar 150ED Deluxe, not the ESPRIT 150ED TRIPLET
The scope itself didn't come with a manual or operations manual unfortunately.
100% its the reflection of a window frame, off-axis - its enough light to illuminate your bottom right of the cell/shield too. I susect even though you are pointed at a wall, the window is top left off frame
Peter, if you rotate the scope and the 'defect' does not rotate at the same time, I can't imagine it's actually something to do with the scope itself - it would suggest it's something external in the environment...?
Fox
