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This NEW premium 90mm f/6 ED Triplet refractor is designed for the discerning astrophotographer or astronomer so has minimum 0.95 Strehl ratio and includes a test report.
Fully multicoated triplet optics, with an ED lens equal to FPL-53, delivers high contrast views with very low chromatic aberration.
Sturdy 2.5" Rack & Pinion, dual speed focuser with 1:10 fine focusing and integral rotator provides excellent load bearing capacity and precise focus adjustments.
CNC machined aluminium fittings and Carbon Fibre tube provides high strength and excellent thermal properties.
A matching 0.8x StellaMira Reducer / Field Flattener is also available that enables astrophotography at f/4.8 with an evenly illuminated imaging circle large enough for sensor sizes up to and including APS-C.
Price includes CNC tube-rings, Vixen-style dovetail mounting bar, carry handle and aluminium carry case.
Air spaced triplet, includes 1x ED element (equivalent to FPL-53)
I was looking at this scope and a few others with similar apertures, and I am very pleased that I chose the StellaMira. Build quality is brilliant- it's very well made, with a great finish (I really like the carbon fibre). Optical quality is right up there as well, my scope reported a Strehl ratio of .972, and the views are stunning- very sharp stars and great colours. Observing the moon was a delight, with a very crisp image. Using the dedicated 0.8 reducer/flattener gave some great DSO images.The focuser and camera rotator are very smooth and make using it a pleasure. As others have said, the dew shield is perhaps a little shorter than may be expected, but with a heater strap I had no trouble at all with dew (or stray light) over a 4-hour imaging session in early January.Overall, I'm very happy with this purchase/investment. Top marks also for the service from FLO- very quick despatch after ordering (even just before Christmas)
It was a toss-up between this, Sharpstar 94, and WO FLT91. ended up getting this one, and must say it is quite an impressive little scope at a lower cost. works well with TSFFLAT2 and TSRedJM63S and Starfield 0.8x flattener. only complaint is that the dew shield is too short. i have two dew 12V straps working on it, so dont expect much problem with dew, but would have been nice if it was a bit longer to help with stray lights. would have knocked of half a star it that was possible
Iíve been waiting for an Esprit 100 to come back into stock for a while with no luck, so decided to look elsewhere. The alternatives were this and the William Optics FLT91 at a considerably greater expense. Further research demonstrated the similarities between this and the WO are more than skin deep, and so, given the red ZWO gear and black and red iOptron mount I had, the Stellamira seemed a choice worth making. In terms of build, the quality is right up there. Everything is solid and well-finished. The focuser is smooth and well-damped. My example measured at a hair under 0.98 Strehl and the images Iíve shot so far with it haven't disappointed. This one will be with me a while (and the red matches the ZWO stuff perfectly).
I was torn between this and the WO GT-81 IV but went for this for the extra apeture and glad I did. The finish is lovely the carbon and red really look the part. The dew shield is quite short but I've not had any problems with dew yet but the temp hasn't drop enough to make my dew heater switch on so only time will tell. The focuser is very smooth as is the built in camera rotator. I've only used mine with a modded 600D but all the stars were nice and round with great colours, I'm looking forward to using a dedicated cooled camera with this scope. FLO service was perfect and Alex has been a great help to me.
I received the telesope today and, of course, the weather started to misbehave so this will be more of a first look than a review. It is not only good looking but also pleasing to use, the focuser and rotators have that smooth oily move withouth any hint of play, the dew shield slides with the right amount of friction and stays where you put it, the rings are a tight fit - maybe a bit too tight - and can hold the tube even if the screws are loose. The atention to detail is heartwarming: the rings screws have teflon washers, on the front ring you'll find tyny bumpers that prevents collision with the dew shield, the reducer/flattner brings the mirrorless camera in the right orientation relative to the rotator, there is a spare screw supplyed in a tiny bag just in case... On inspecting the lens, I was impressed by the coatings - the glass is allmost invisible when you look perpendicular and dark green from aside. I took some pictures with the reducer/flattner with my Fuji xt4 and there was no trace of lateral CA and only a hint of longitudinal CA on some out of center, out of focus and high contrast parts of the image. It might lose some quality on the corners of a full frame sensor but on a crop sensor camera like ASI 2600 it will be a blast. I'm gonna test its resolving power when the weather will allow but i'm shure it will perform as good as it should. I don't have any previous experience with instruments of similar aperture and price so I can't say where it stand relative to its peers but i can tell you won't see much impovement from a more expensive one. As for the negative side: is a bit back heavy, with all the photo gear attached you might need to attach a weight to the front of the dovetail or, better, replace it with a longer one. The transport case is doing a good job protecting the instrument but ain't gonna take much punishment; if you travel, buy a decent one. I will end by thanking all at FLO for the excellent job they are doing providing good products and fast service. Respect!
First Light Optics LtdUnit 7 Budlake UnitsBudlake RoadMarsh Barton Trading EstateExeter, DevonEX2 8PY
Company No. 5892293VAT No. 907 2895 01
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