Quote:
Originally Posted by carlstronomy
Hi sorry for hijacking your post here (love your images mine are rubbish) but I was under the impression that extender tubes increased the field of view for example the neximage extender tube from Celestron thus making the image smaller. I can clearly see your image has increased in size, I am a little consfused are we saying a Barlow with the lense removed will still increase the size of the image?
Carl
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Welcome Carl
The "Extension Tube" we are referring to here is either a purchased tube or a homemade one (old Barlow with lens removed) that has no lens/s. It is placed between the normal Barlow (with lens) and the Camera. Increasing the distance between the Barlow and the Camera has the effect of increasing the power of the Barlow. With several of these extension tubes of different lengths, a handy range of powers may be obtained from a single Barlow
