# Refractor/Reflector telescope Skywatcher BKMAK 90 SP OTA — 90 mm aperture, 1250 mm focal length

**URL:** https://aio.lv/en/product--skywatcher-sw-3001--11370969
**Data updated:** 2026-03-31 13:04 (EEST)
**Category:** Telescopes
**Manufacturer:** Skywatcher
**Manufacturer code:** SW-3001
**EAN:** 5901691600867
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 217.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 180.16 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--skywatcher-sw-3001--11370969

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 25.06.2026 | free |
| Pickup points | 30.06.2026 | 1.99 EUR |
| Courier delivery to door | 30.06.2026 | 4.99 EUR |

## Summary description

Skywatcher BKMAK 90 SP OTA is a compact Maksutov–Cassegrain type telescope with a 90 mm aperture and 1250 mm focal length. As an OTA (optical tube assembly), it provides high-contrast views of the Moon, planets and bright deep-sky objects. Suitable for visual observing and basic astrophotography when paired with a compatible mount. Portable for field use and backyard astronomy.

## Long description

Skywatcher BKMAK 90 SP OTA is a compact Maksutov–Cassegrain optical tube assembly with a 90 mm aperture and 1250 mm focal length. The design combines a long focal length in a short tube, delivering high-contrast, sharp images of the Moon, planets and brighter deep-sky objects. As an OTA, it contains the optical elements and focuser but requires a compatible mount and eyepieces to form a complete observing setup. Its portable size and rugged construction make it suitable for both backyard observing and field use.
Advantages
The Maksutov–Cassegrain configuration provides good correction of aberrations and a long effective focal length in a compact tube, producing high-contrast images with a relatively narrow field of view ideal for lunar and planetary detail. The 90 mm aperture balances portability and light-gathering capability, while the 1250 mm focal length yields a focal ratio favorable for high-magnification visual observing and basic planetary imaging. The OTA format allows users to pair the optical tube with a variety of mounts and accessories to suit different observing needs.
Suitable for
 Visual observation of the Moon and planets
 Observation of bright deep-sky objects (nebulae, globular clusters) under moderate skies
 Portable field astronomy and backyard sessions
 Basic astrophotography of planets and the Moon when mounted on a stable tracking mount
Key specifications
 Optical design: Maksutov–Cassegrain (catadioptric)
 Aperture: 90 mm
 Focal length: 1250 mm
 Focal ratio: f/13.9 (approx.)
 Optical tube assembly (OTA) format — requires separate mount and eyepieces
 Compact, portable tube suitable for transport
How to use
Mount the BKMAK 90 SP OTA on a stable equatorial or alt-azimuth mount rated for the OTA mass and intended accessories. Install a compatible diagonal and eyepiece into the focuser for visual use, or fit an appropriate T‑ring/adapter and camera for basic planetary imaging. Collimation is generally stable for Maksutov designs, but inspect and adjust according to the mount and accessories used. Balance the assembly on the mount, perform polar alignment or level alignment as required by the mount type, and use low- to medium-power eyepieces for locating targets before switching to higher magnifications for detail work.
Usage recommendations
For best visual results, observe from a stable mount on nights with steady seeing; use low-humidity locations to improve contrast. When attempting basic astrophotography, use a motorized tracking mount and short exposure techniques for planetary imaging. Protect the optics with a dust cap during storage and allow the OTA to reach ambient temperature before high-magnification observing to reduce thermal currents.

## FAQ

### How much does the Skywatcher BKMAK 90 SP OTA telescope 90mm 1250mm cost, and is it available for purchase?

The price is 217.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 6 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 25.06.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay, Installment. All transactions are 100% secure and encrypted.

### Can Skywatcher BKMAK 90 SP OTA telescope 90mm 1250mm be purchased with a lease?

Yes, the purchase is available both on credit and with an interest-free installment plan. Learn more about installments and credit options: https://aio.lv/en/payment#b3

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Skywatcher products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Skywatcher service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/11370969/65858398_large.webp