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APM 203/1420 F/7 Triplet Apochromatic Refractor (3.5" SL)


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The 203mm lenses are also available in 2 versions, the 1420mm focal length measuring 203/1420 CNC-LW II is the f / 7 variant. Do the math: with Riccardi Reducer f / 5.25... Read more

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SKU: LZOS-203-1420-T-CNC-3.5FTN/A
The 203mm lenses are also available in 2 versions, the 1420mm focal length measuring 203/1420 CNC-LW II is the f / 7 variant. Do the math: with Riccardi Reducer f / 5.25 !!! A gigantic, non-obstructing astrograph with 8 “aperture and 1065mm focal length. Only APM can supply such optics!

The APM-LZOS Triplet SuperED Apo 203/1420 CNC LW II is quite compact for its size and also fits into smaller observatories. The dimensions are manageable, the performance is phenomenal: The theoretical resolution of significantly less than 0.6 arcseconds can actually be achieved on corresponding nights and that is not a slogan! The excellently polished optics will show details on the planet that you did not consider possible. Observe deep sky objects once binocularly, e.g. M13, M31 or h & Chi Persei, a real treat! You will immediately notice the enormous contrast, this enables detailed perceptions that are not possible with other systems.

LZOS conducts its own glass research / development and also produces these glasses itself. This results in perfect control of every development stage. APM has been a partner for civil optics for decades and can actively participate in the development of optics, which contributes to the optimization and adaptation to the needs of professional and amateur astronomers.

This telescope is a gem of every observatory. APM can deliver these very high quality Triplet SuperED apochromats at relatively short notice and at very attractive prices! There are no multi-year delivery times! Due to the excellent optical imaging performance and the fully editable configuration, this apo is also interesting for institutes, research institutions and observatories. The entire telescope is still relatively light at approx. 28kg and can be moved with medium-weight mounts.

In addition to the large 3.5 “FeatherTouch focuser, all important reducing adapters, sleeves and the viewfinder holder are already integrated to conveniently connect both photographic and visual accessories. Multi-compatible pipe clamps are standard, a stable transport box is optionally available.

A wonderful high-tech device that can be tailored to your needs!

Delivered with Order:
  • Optical tube with retractable dewshield
  • Set CNC tube rings
  • 3.5" Starlight Focuser with attached bracket for 50 mm viewfinder, both 360° rotatable
  • Adapter 3.5"/2" with new comprehensive eyepiece clamp
  • 2"/1.25" adapter with brass eyepiece clamp
  • 2" Extensiontube 80 mm
  • Test report
  • 2 Dustcaps

this is a new tube model made in Germany in extra high quality from Aluminum:

- Tube length dew cap fully extended to the end of focuser 140cm
- Dew cap length 31cm
- Dew cap diameter 228mm
- Tube diameter 200mm
- Weight including focuser and clamps 24 kg

Type of telescope

3-element SuperED Apo Refractor


3-element SuperED



Tube material



203 mm

Focal ratio


Focal length

1420 mm





Limit value

13.3 mag

Max. useful visual power

400 x


220 mm


3.5" Starlight Feather Touch, 360° rotatable

Connection to eyepiece

3.5" to 2" and 2" to 1 1/4"


Bracket for 50 mm Viewfinder, Viewfinder optional

Tube diameter

238 mm

Length during observing

1520 mm

Transportation length

1260 mm

Dewcap diameter

271 mm

Length of dewcap

420 mm

Width of tuberings

2 tuberings each 30 mm

Threads in tuberings

1/4" 5 x

Distance of threads

centric, 2.362" and 3.2" distance

Tube weight

61.7 lb incl. Tuberings

Included accessories

Adapter 3.5"/2" and 2"/1 1/4" with Brass Clamp, 2" Extension 80 mm, Tubering Set, Certificate, Dustcaps, 2 Steelrails with 4 magnetic Balancing Weights



Eyepiece adapter

to 2" and 1.25"

APM: If the product has been purchased for personal use, the warranty period is 24 months for new products, and 12 months for used products. If the customer is an entrepreneur, the warranty for new goods is 12 months, and APM will decide if they will rectify the defect or deliver a defect-free item.


At Stargazing Telescopes we are dedicated to making sure our customers receive the highest quality products. If for any reason you would like your purchase repaired or replaced, all you have to do is call us at 540 253 3466 or email us at and we will advise you on how to proceed.

Each of our vendors have different warranty protocols for their products. Please see the relevant section below to get more information on the specifics of their warranty policies.

Warranties will not be valid for products that have been misused or tampered with by the customer, and each manufacturer retains the right to inspect the product to determine whether it is covered by their warranty. If an item needs to be repaired or replaced, the customer is responsible for shipping costs unless otherwise stated.

Please note, you must have proof of purchase (copy of your receipt) in order for the warranty to be valid.


*APM: The Shipping & Delivery Policy does not apply for APM as the products are shipped from outside the US. Please note, import duties may apply to some APM products. You will be notified of this additional cost at the time of delivery.  Email us at or call us on 540 253 3466 for more information regarding inventory and shipping.

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 five business days), we will process the charges and submit the order for shipment.

Order Shipment & Delivery:

If your order is in stock and we process the charges to your credit card, it 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

Delivery times will vary based on your location and the shipping method that our vendors use. Economy shipping generally takes five to eight business days to arrive, and Standard shipping generally takes three to four business days. 


Please inspect the packaging of your item(s) when they arrive, if you notice any damage you should make note of it when signing for delivery.  If your item(s) do arrive damaged, please send photos to and we will contact the manufacturer on your behalf.

APM: As APM products ship from Germany, international returns are not accepted. 

Return Policy:

Here at Stargazing Telescopes we make returns as easy as possible. You may return your purchase within the allotted time frame that each manufacturer allows. You will be responsible for shipping charges as well as a 20% restocking fee (20% of the price of product).

To request a return please email and include your name, order number and date of purchase. We will also require proof of purchase, which is a copy of the receipt.

Returns must be authorized before being sent. We will contact the manufacturer on your behalf and issue you a RMA number which is mandatory for returns.

To be eligible for a return, your item must:

  • be unused and in the same condition that you received it.
  • be undamaged and in the original packaging.

Products not eligible for return:

  • Products that have been used or tampered with
  • Products not in resalable condition
  • Custom orders
  • Products not in original packaging
  • Products that do not have an RMA number

The buyer is responsible for all shipping costs and must use the shipping method as specified by Stargazing Telescopes to ensure the item is not damaged in transit and is tracked and sent safely. Refunds will be processed within 14 working days from the point we have received your return.

Approved refunds will be issued after the manufacturer inspects and processes your return which can take up to 7 Business days. Return shipping charges and re-stocking fees are not refundable. Shipping charges and factory re-stocking fees will be deducted from the total refund amount. You will receive a confirmation email when your return has been processed. Refunds will be credited to the original payment method and can take up to 72 hours to reflect on your statement.


All orders cancelled after 24 hours are subject to a $20 administration fee, whether or not your order has shipped. If your order has shipped, you (the buyer) will also be responsible for return shipping charges. Refunds will only be issued to the original credit card that you used when placing your order.


Please inspect the packaging of your item(s) when it arrives, if you notice any damage you should make note of it when signing for delivery. If your item(s) do arrive damaged, please send photos to and we will contact the manufacturer on your behalf.


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APM 203/1420 F/7 Triplet Apochromatic Refractor (3.5" SL)