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Telescope Refractor - APM Doublet SD Apo 140 F/7 FPL53 Optical Tube W/ 3.7" Focuser
Telescope Refractor - APM Doublet SD Apo 140 F/7 FPL53 Optical Tube W/ 3.7" Focuser

APM Doublet SD Apo 140 f/7 FPL53 Optical Tube w/ 3.7" Focuser

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    APM Doublet SD Apo 140 f/7 FPL53 Optical Tube

    The new APM 140mm f/9 80mm Doublet is a mold breaker with high quality. We have painstakingly engineered an optical and tube solution to bring you APM quality at an unheard price. The new 140- SD Apo features a Doublet lens cell using SD glass FPL-53 to maximize performance. Our innovative combination of materials and design has resulted in optical performance far beyond the normal for a telescope of this price. As with all APM telescopes consistency is assured and each telescope goes through an interferometrical test at the 532nm (green) wavelength before shipping.

    The special feature of the 140mm SD APO:
    •  Very high quality processed and of convincingly good optical quality
    •  Colorless optics with FLP53 glass
    •  Precise 3.7" focuser with 1:10 mirco reduction for heavy accessories
    •  With f / 7 ideal for visual and photographic purposes
    •  CNC tube rings
    •  Carry handle
    •  Very good value for money

    With 980mm focal length, the 140-SD Apo is an impressive all-rounder. From intricate double star observing to high contrast detailed planetary views, this new scope will introduce a whole new group of Astronomy enthusiasts to APM quality.

    Traditional APM quality has been applied in all areas. The new 3.7" focuser is a Rack and Pinion type, with 1:10 focusing. It remains rigid under high loads making it suitable for imaging. The attention to detail extends to areas like the 2" and 1.25" eyepiece adapters. These use a new design of collar clamp, far superior to the common brass compression rings found on lesser designs. 

    As optional photo accessory for the SD APO 140 f / 7, we recommend our Riccardi Flattener APO Reducer 0.75xM82 (the focal length is reduced to 735mm at f / 5.25) or our Riccardi APO Flattener Model 2 for APO's. (please look recommended products)

    With the new 140 mm SD Apo we believe we have created an Apochromatic Refractor of incomparable performance and value in its category.

    Delivery contains:
    • Optical Tube
    • 1 Pair of Tuberings with handle
    • 3.7" Focuser with 1:10 Microfocusing
    • Losmandy-Style Dovetail
    • Shoe for Finderbracket

    Type of telescope: Doublet ED-Apochromat Lens: Doublet ED Apo with FPL-53 Element Color: black / white Tube material: Aluminium Aperture: 140 mm Focal ratio: f/7 Focal length: 980 mm Coating: Multi-coated Resolution: 0.83" Limit value: 12.5 mag Max. useful visual power: 280 x Backfokus: 180 mm Focuser: 3.7" R&P Focuser, Rotation 360° Connection to eyepiece: 2" Viewfinder: none supplied Tube diameter: 152 mm Length during observing: 1030 mm Transportation length: 830 mm Dewcap diameter: 186 mm Length of dewcap: 290 mm Total weight: 9.8Kg (with tuberings)

    We work very hard to ensure that we offer the absolute best prices online.  If you find another online store that offers a lower price then us within six months of your purchase date please let us know and we will refund your original payment for the difference.  We want you to feel confident that you are getting the absolute best price for the product you are ordering.  If you find that our own website has a lower price for the same item you have ordered within six months of your purchase date will refund the difference as well.

    To request your partial refund simply e-mail us a link to the same product on our website, or on our competitors website within six months from the date of your order and we will process the credit accordingly.

    Our 100% Price Guarantee has some limitations:

    • You must purchase the item from our website before requesting your Price Match Guarantee
    • Promotions such as rebates and buy one, get one free offers are not eligible
    • The item must be in stock on the competitors website
    • The competitor must be an online store, they may not have a retail location
    • The website can not be a discounter or auction website (ie; eBay, overstock, etc..)
    • The competitor must be an Authorized Retailer of the product in question
    • The Price Match Guarantee includes the item price and the shipping charges, it excludes sales tax

    Order Confirmation 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.  As soon as we receive your order we automatically reach out to our suppliers to confirm that it is in stock and available for immediate shipment.  If your item is on backorder or unavailable we will void the pre-authorization and reach out to you via e-mail.  If your item(s) are available for immediate shipment (within 5 business days) we will process the charges and submit the order for shipment.

    Order Shipment If your order is received, the inventory is in stock and your credit card information matches the information, In most cases, we can ship within 5 business days. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address your provide when checking out.  If you do not receive tracking information from us within six business days of your order please email us at info@skygazeoptics.com.

    Miscellaneous Shipping Information

    • We cannot ship to PO boxes.
    • Non-standard shipping surcharges will apply to isolated service areas, such as remote areas, areas not readily accessible by a delivery vehicle, islands, Hawaii & Alaska etc., as defined by the shipper. These circumstances occur less than 1% of the time.

    Delivery Times

    You can estimate the deliver time to your home or business by viewing the "Ships Within" information listed with every product. This refers to the time from when you place your order, to the time it leaves the warehouse. The total delivery time for your order is calculated from the time your order is placed, until you receive it. The diagram below shows how the total delivery time is broken down into pre-ship processing time and shipping time. 

    Processing time is the time it takes from when you submit your order to when the product leaves the warehouse. The "Ships Within" time frame listed with each of our products on the website applies to this time frame. For example, if your order a product that reads "Ships Within: 2 Weeks", this means that the product typically leaves the factory within two weeks. If there will be any additional time required to process your order, we will notify you immediately to confirm the delivery period. This time is needed for products that are shipped to you directly from our manufacturers. The manufacturers need this time to fulfill your order. In some cases, the items are custom built.  Shipping time is measured when your order leaves the warehouse to when it arrives at your address. Actual shipping time can vary between 2-5 business days. Contact our helpful customer service experts at (888-264-2244)  for more information.


    Did your shipment arrive damaged or defective?

    Please report damaged or defective merchandise to us immediately by email phone. Photos of the items and the packaging would be greatly appreciated. This will speed up our resolution process. We strongly recommend at the time of delivery, if your notice any cartons that look dented, crushed or just not right, open them immediately and inspect the contents. If the contents appear to be damaged, please notate it on the delivery ticket, refuse that item only and contact us as soon as possible for instructions.

    Brands/Products that do NOT qualify for our 30 Day Return Policy:


    APM products do not qualify for our 30 day return policy.

    Custom Orders

    Additionally, items that are special ordered, customized, or engraved - cannot be returned or refunded under our 30 day return policy. 

    If your engraved item needs to be repaired within 30 days of purchase, please reach out to us and we will have the product repaired or replaced, re-engrave if necessary, and return it to you in new condition.

    Customer Reviews

    Based on 2 reviews
    Gaston Dauzat
    APM 140 FPL53 with 3.7" focuser...

    I am proud to say that this the finest refractor that I have ever owned. The optics are incredible , I can use over 80x per inch with no image breakdown. Not many scopes can do that. The star images are pin point and the background is jet black ... a perfect image... almost unbelievable. The doublet cools extremely fast and is ready for observing in minutes. Thanks to Nick and APM for a great scope.

    KD...Marksville, Louisiana

    Ken D.
    Great and Impressive Refractor...

    Tested the 140mm F-7 980mm FL, with FPL-53 doublet optics today. I have owned several hundred telescopes in my lifetime and as owner of "Ken's Rings and Telescopes Accessories, after 50 years of testing telescopes that I have built and owned, several hundred, this APM140 displays excellent optics and a professional made optical tube assembly. The 3.7" focuser is rock solid and butter smooth...the finest that I have ever seen or used.
    For testing optics, I use an artificial star pattern indoors at a distance of 75 feet to test all my scopes. The airy disc shows perfect rings, inside and outside of focus is nearly identical. The baffling inside the tube is jet black with no inside tube reflections or glare even in bright daylight. Using a 6.7mm ES 82 degree ocular and a 3x barlow (438x) The image is extremely sharp even at that power. at approx 100 feet appear razor sharp showing much detail at this power and no visible false color at the leaf edges. I know from experience testing my scopes in this manor that a clear and steady night sky will show amazing detail on lunar and planetary images.
    I prefer a doublet over a triplet optical system for several reasons ... since the light output is greater on 2 lenses instead of 3. The wave tolerance error on 4 surfaces (doublet) is much less affected than by 6 surfaces as with a triplet. Also I like the fact that the doublet objective cools quicker and the front of the tube weights less that the heavier triplet making a more pleasing balanced scope. Also the heavier 3.7" focuser and 8x50 finder additionally helps balance the OTA, pushing up the focuser nearer to the mount and extends the objective further out...the way a great refractor should look.
    Nick at Skygaze Optics was a pleasure to do business with. He was helpful in every way and keep me informed of my order delivery. Thanks again Nick! ... I will do business with you again.
    Again, thanks to Nick at Skygaze Optics and APM for a great impressive refractor!

    APM products returns are subject to a 20% Restocking fee to ensure we can continue to offer exceptional value consistently. 

    If there is any quality control issue to be addressed, we ask that you follow the instructions on our shipping and returns page and we will make sure the issue is handled.

    Some APM products are subject to import duties and/or taxes which you will be notified to pay at the time of delivery. 

    We do our best to take care of your shipping costs; however, special order products like these may come with a small additional cost to our customers. 


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