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A handy, good value, nicely made set of shorter M48 extension tubes: 4mm, 5mm, 6mm, 7mm, 8mm & 9mm.
These are suitable for use with a wide variety of M48-threaded equipment and can be used singly or in combination to achieve your desired back focus.
39mm total back focus when all extensions used.
Black anodised Aluminium.
M48x0.75 male thread at one end and M48x0.75 female thread at the other.
Excellent service but for the first time after purchasing many items over the past 8 yrs from FLO this is the first time a product has been less than 100% satisfactory. The rings come stacked together and several were thread bound out of the box but finally separated with aid of rubber gloves. When snugged up found they became loose again but nippimg up a little bit tighter become thread bound. Iwould risk using them in between other spacers but nervous using next to oag, filter wheel or camera in case they remain seized as too narrow to use strap wrench and quite flimsy so would probably distort using pipe grips/wrench. Obviously the other review for these rings is a positive 5 star so maybe I've just been unlucky with this set.
I'm sorry to hear you are not happy with these, please contact us if you would like to return them for a refund.I cannot account for the experience you have had with these as it doesn't match our own experience with these adapters - we have found them to be well machined with nicely formed threads but, with all aluminium adapters we would advise using something in the threads to stop them binding in the cold like a small amount of silicone grease or better yet, a delrin spacer.
These spacers are ideal to get that back focus accurate - a good range of sizesproduct is well made and threads have been formed well within tolerances (nice secure fit without binding)the 'blacking' is a little bit shiny to start with this should dull down with being outside (no reflection perceived)Ideal when changing the cameras to suit targetexcellent service by FLO as always
First Light Optics LtdUnit 7 Budlake UnitsBudlake RoadMarsh Barton Trading EstateExeter, DevonEX2 8PY
Company No. 5892293VAT No. 907 2895 01
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