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Explore Scientific Field Flattener, Focal Reducer
Explore Scientific Field Flattener, Focal Reducer

Explore Scientific 3" Field Flattener, 0.7x Focal Reducer - FFFR507X-00

Vendor
Explore Scientific
Sale price
$479.99
Regular price
$499.99 You save 4%
Unit price
per 
Use code "TAKE5" at checkout for 5% off all orders | Ends:
Shipping calculated at checkout.

Availability:

Estimated Arrival: Between Dec 03 and Dec 09. *ETA to USA Only

Shipping & Returns: Satisfaction guaranteed 30 day return policy.

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Explore Scientific’s 3-inch Field Flattener/0.7x Focal Reducer is a multi-faceted accessory designed to enhance your astrophotography experiences. As a field flattener, this piece addresses the edge-of-field aberrations caused by curved focal planes to ensure your night at the eyepiece will result in crisp, true images.

As a focal reducer, this device will reduce your f-ratio by 0.7, which results in a wider field of view, brighter images and less exposure time. Recommended for our 127mm and 152mm refracting telescopes (excluding our doublet refractors), this field flattener/focal reducer boasts fully multi-coated optics.

This item comes with a threaded adapter that threads onto the Explore Scientific 2-inch rack-and-pinion focuser. Threaded attachment to a 2.5-hex focuser, which comes stock on the Explore Scientific 127mm APO telescopes, requires purchase of an additional adapter. 

The field flattener/focal reducer offers 55 mm of back focus from the rear face of the device. The M42x0.75 adapter adds 3 mm, so the sensor needs to be 52 mm from the face of the adapter.

To connect to the 2.5 hex focuser, purchase item number 510366.

While technically this was designed for the f/8 system, through user experiences and subsequent testing it is concluded that the 3-inch field flattener/reducer performs very well with the f/7.5 refractors.

Specs

Item Number FFFR507X-00
Weight 1.4lb; .64kg
Diameter 78.3mm
Height 90.1mm


Shipping

We know that once you've placed your order, you are anxious to receive it! We make every effort to get your order shipped out to you as quickly as possible.

As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. We will process the charges to your credit card and your order will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at info@telescopetek.com.

Standard shipping time in the US is between 3-5 business days, though it can vary slightly depending on the destination. We typically For updates on your shipment you can enter your tracking number here.

We distribute nationwide via UPS and Fedex. Unfortunately, at this time we are not able to provide expedited or international shipping.