Barlow advice

[LegendLeesV2]

Hello, I am about to order my first telescope which is a Skywatcher 130p, I have a Nikon D5100 coming with a T-ring and various lenses (from Amazon).

My question is simply this, what kind are barlow do I need to make this connection complete, and if any what other pieces of equipment will I need (bare in mind I have a mount, tripod for the camera, remote shutter etc.)

Any advice welcome.

Thank you.

[hemihaggis]

you dont need a barlow to connect your camera .

[Cornelius Varley]

You will meed a barlow lens to allow the camera to come into focus. most relflectors don't have enough inwards focuser travel to allow a DSLR to reach focus with prime photography. The barllow lens will move the point of focus further out giving the focuser the required extra distance. Watch this youtube video for a further explanation Connecting a SLR camera

Peter

[hemihaggis]

or an extension ....

[Cornelius Varley]

An extension tube wouldn't work with the 130p, it would only move the camera further away from the point of focus. A barlow lens moves the point of focus out from the telescope and gives the focuser a bit more travel.

Peter

[hemihaggis]

nope, i been having a think about your suggestions cv , and as its a newt , the problem will be racking the focuser in towards the scope far enough with the camera attatched to achive focus , surley adding extensions or barlows will not work .?

[Cornelius Varley]

nope, i been having a think about your suggestions cv , and as its a newt , the problem will be racking the focuser in towards the scope far enough with the camera attatched to achive focus , surley adding extensions or barlows will not work .?

A barlow lens will work because this actually shifts the point of focus. An extension tube just adds extra length to the focser but doesn't move the point of focus. What the youtube video to see why a barlow is used.

Peter

[LukeSkywatcher]

I have hooked my 450D up to my Heritage 130P. I found the camera would not focus. I tried the same setup but included a 2X barlow and it worked perfectly.

IIRC.........it is the opposite with my refracs. The cam will not come to focus if i use the barlow, but works fine when i remove the barlow.

[LegendLeesV2]

Thanks for all the information, I will watch the video and hopefully have a better understanding before I order anything, thanks again.

[Daz1974]

Ive just received my 130p (the GoTo version) and it came with a 2x barlow even though it wasnt mentioned in the list of accessories. It also came with a moon filter as well

[LegendLeesV2]

Ive just received my 130p (the GoTo version) and it came with a 2x barlow even though it wasnt mentioned in the list of accessories. It also came with a moon filter as well

Well my Sky-watcher 130p arrived today and yes like you said it had a 2x barlow lens with it (this was after I already bought one a few days earlier - the same one!)

Lesson learned I guess.