Just to keep it perfectly clear, there is no cropping/vignetting of the apparent field of view. There is a 15% magnification increase so the true field decreases as a consequence, something you should take into account before purchase of subsequent eyepieces. A paracorr is probably a luxury with an f/5 dob and you should put money towards the eyepieces you want/need before spending on the Paracorr. (as a side note, I purchased my Paracorr from Astromart for about AU$315 shipped - new price is too much for me). Purchasing used allows you to minimize losses if you decide to resell the item - of course there are risks buying used as well.
Quote:
Originally Posted by MarkN
Tony
Is the view through the Parracor the same as normal but with the distorted edge cropped? There is an effective increase in focal length, ie narrower FOV; so I'm left wondering if I should just ignore the last bit of the field of view and save the $500 for other items.
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