TAKAHASHI
Although the Takahashi FSQ-85EDX is designed as a Petzval quadruplet, the full-format sensor coverage was not perfect and the edge of the field suffered from a slight astigmatism typical of this optical system. Takahashi offers a dedicated corrector to correct this defect and thus offer results close to those of the FSQ-106ED.
Available Upon Request
This category includes products which are not kept in stock and for some reasons -which don’t depend on our company- can’t be available in less than 14 days. Specifically, this category includes new products thar are pre-advertised by manufacturers, however they are not available in Greece yet. You can pre-order these items with a special preferential price. If the estimated arrival date of this product is already known, then the estimated date will be written above the indication “AVAILABLE UPON REQUEST”.
FL 1.01x FLATTENER (FSQ-85ED)
With the continuous development of DSLRs and CCD/CMOS cameras, more and more astrophotographers are equipping themselves with imaging systems with large, full-format, small-pixel sensors. This change is a real challenge for conventional refractors, most of whose lenses have been designed to best cover the APS-C format. Although the Takahashi FSQ-85EDX is designed as a Petzval quadruplet, the full-format sensor coverage was not perfect and the edge of the field suffered from a slight astigmatism typical of this optical system. Takahashi offers a dedicated corrector to correct this defect and thus offer results close to those of the FSQ-106ED. The field is perfectly corrected on a diameter of 44 mm. The flattener causes the focal length of the FSQ-85EDX to be slightly increased (by a factor of 1.01x) from 450 mm (F/5.3) to 455 mm (F/5.4).
The flattener has a M72x1 male thread on the telescope side and a M54x0.75 female thread on the camera side. The required backfocus behind the corrector is 56.2 mm. A female thread at the front accepts filters with an M58 thread.
Diagram of the focal point position and threads of the Takahashi FL1.01X field corrector
Spot-diagram of Takahashi FSQ-85EDX refractor with FL1.01X field corrector
Net Weight (g) | 200 |
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