SFFX2

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SFFX2

$649.00

SKU:

SFFX-2

Width:

8.00 (in)

Height:

8.00 (in)

Depth:

8.00 (in)

Overview
Reviews

Product Description

**Due to an unprecedented number of orders all SFFX-1 and SFFX-2 flatteners are being built as time permits. As such, please allow 1-2 weeks for assembly and testing of each individual unit.

Made here and available exclusively from Stellarvue, this dedicated field flattener will work with virtually every astro-imaging camera when the proper extensions and adapters needed for your camera are added. It provides an enormous flat field up to 90 mm in diameter for the 180. We designed this to work with our 130 mm - 180 mm refractors. The optimum distance from the back of the flattener to the cameras sensor varies depending on the telescopes focal length.

We make several versions of this flattener. The optimal distance to the camera's sensor from the back of the flattener itself (with the included M69 adapter) is about 80mm for the SVX130T and SVX140T, and 79mm for the SVX152T and SVX180T as shown above. The front of the flattener threads directly to the Feather Touch 3.5" focuser when the 2" adapter is unthreaded from the focuser. The rear attachment thread of the flattener is a male M109X1 and the thread is 6 mm long. An M69X1 adapter is included and may be used with our M69 extension tubes. Using larger adapters this flattener has up to a 95 mm clear aperture!

We offer these flatteners in the below configurations that may be selected at the top of this page:

1. Flattener with M69 adapter as shown above. This does not include any extensions, only an M69 adapter that works with our M69 extension tubes.

2. Flatteners with full frame camera adapters. These come with M69 extensions and an M48 adapter that provide a 55 mm back-focus for the following Stellarvue telescopes:

SVX130T and SVX130T-R (130 mm f-7)
SVX140T and SVX140T-R (140 mm f-6.7)
SVX152T (152 mm f-8)
SVX180T (180 mm f-7)

By selecting the giant flattener above that is made to work with your telescope, you will be set as long as you are using a DSLR's with 48 mm t-ring or a ZWO camera. If your camera has a different camera back focus or thread size see number 3 below.

3. Custom flatteners without a custom price. Select this if you need a back-focus that is more or less than 55 mm. Contact us by email and let us know two things:

A. The exact back focus of your camera system including all accessories such as an AOG or filter wheel. This is the distance from the attachment thread on the camera to the camera sensor.

B. The attachment thread on your camera. For example, many cameras use M48X.75 thread but other cameras use various threads. We have adapters for most but not all of them.

Call or email us if you have any questions.

Weight with adapters is 2lb 1oz.

Product Videos

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Product Reviews

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5
SFFX2 Flattener

Posted by Paul O’Brien on 13th Feb 2023

Two nights ago, the first clear skies in weeks gave me an opportunity for first light with my TEC140ED and new SFFX2 flattener from Stellarvue. The flattener is HUGE and weighs 2 lbs. It's a thing of beautiful - well engineering and designed, simple and clean. The front of the flattener threads directly to the Feathertouch 3.5" focuser. SV provides different adapters and extensions to fit various camera threads and imaging train requirements. SV made a custom adapter for my QHY600M rig and provided two additional 1mm spacers and a 10mm extension for my specific back focus needs. The back focus is spec’d for 79-80mm, depending on the scope size and FL. I ended up with about 81mm for the TEC140 and still need a tad more spacing so I'll probably end up adding another .6 -.8mm spacer. So far, I'm very impressed and it looks like a great match for the TEC. BTW - Vic at Stellarvue was a pleasure to work with on the flattener.

Paul: Thank you!
Vic Maris
5
SFFX-2

Posted by Jerry yesavage on 6th Dec 2021

Makes images from my SVX 130T flat as a board. Checked with CCDInspector.