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Hi anamorphic lens buffs,   I've just purchased a GH3 and want to get involved in the wonderful world of anamorphic lenses... but after extensive reading and looking on ebay, I'm confused. Apologies if some of my questions are idiotic.   It seems the consensus is that iscorama is the best - but with none currently on ebay I can't find how much one should be. How much should a 36 go for, or a 54, and where might I source one?   What are the Isco Optic Ultra / blue star? Are these related to the iscorama? Some on ebay are labelled Isco Iscorama - is it the same company? Are these wrongly labelled? Here is an example of one:   http://www.ebay.co.uk/itm/Anamorphic-Lens-RARE-Isco-Iscorama-2x-MINT-DSLR-GH3-GH2-5D-Canon-COMPACT-Sharp-/171168616302?pt=Camera_Lenses&hash=item27da71cf6e   Also many of the pictures of the lens have a ruler showing how long they are. How does the length affect them?    This one for example (though it has no ruler) is marked as 120mm. What does that refer to?   http://www.ebay.com/itm/isco-optic-120mm-with-schneider-super-cinelux-anamorphic-lens-/121211839272   One of my main concerns is getting a lens which will fit over my taking lenses. I have a Voightlander 35mm (which has a 52mm thread), which should be fine... I'm assuming I'd struggle to use my Rokinon 24mm, which has a lens circumference of 77mm, both because it is so wide at the front, but also cause it would vignette badly.   On the GH3 the 35mm lens becomes roughly a 70mm. With the anamorphic adaptor, does it effectively become a 35mm again?   Please could people give me their opinions of the following choices, and their pros and cons? They vary a lot in price and size.    http://www.ebay.com/itm/Kowa-Bell-and-Howell-2x-Anamorphic-Lens-Perfect-Condition-w-Lens-caps-RARE-/181235078150?pt=Camera_Lenses&hash=item2a3273d406   http://www.ebay.co.uk/itm/Bausch-and-Lomb-Anamorphic-Lens-2x-Cinemascope-lens-holder-for-15mm-rods-/231089701199?pt=UK_Lenses_Filters_Lenses&hash=item35ce05014f   http://www.ebay.com/itm/Isco-Optic-Ultra-MC-2x-35mm-Anamorphic-Cinemascope-lens-DSLR-Micro-4-3-/121210681244   http://www.ebay.co.uk/itm/SANKOR-ANAMORPHIC-16C-16mm-WIDE-PROJECTION-LENS-/221311304014   http://www.ebay.co.uk/itm/KOWA-16mm-Prominar-Anamorphic-16-H-LENS-52030-/281127357879?pt=LH_DefaultDomain_0&hash=item41747f0db7     I'm also interested in the SLR Magic anamorphic. Does anyone know when that will be available to buy?   Lastly, people seem to recommend the  Helios 44mm a lot. Why is this?   If it makes a difference to my choice, I think I prefer blue flares over brown, and the nearest focal distance the better... I guess thats what everyone wants!    Thanks for reading my rather long post! All advice gratefully received.   Many thanks all,   Jules