Astrograph ARTEC 250 PRO Artesky

Product category: Product brand: Artesky
Astrograph ARTEC 250 PRO Artesky

Astrograph ARTEC 250 PRO Artesky

  • Astrograph ARTEC 250 PRO Artesky
  • Astrograph ARTEC 250 PRO Artesky
  • Astrograph ARTEC 250 PRO Artesky
  • Astrograph ARTEC 250 PRO Artesky
  • Astrograph ARTEC 250 PRO Artesky
  • Astrograph ARTEC 250 PRO Artesky

Price 11 999,00 €

We recommend Riccardi Coma corrector 1.0x for ARTEC 250 PRO 

You can upgrade the focuser with Starlight Instruments Electronic Focusing System

ARTEC 250 PRO – A revolutionary astrograph for everyday use

The ARTEC astrograph series represents a new kind of instrument due to a strong and precise mechanical system with the use of high-end optics.

The ARTEC project was born in 2011 from the intuition of Mr. Seveso and then it was developed more and more with the help of our engineer Mr. Simeone.

Our astrograph uses the classic Newton native F/4.0 optical system consisting of a parabolic primary mirror in Pyrex aluminized and treated with a reflection of over 93%, secondary mirror has the same type of processing and treatment.

The carbon tubes are made with 3K twill with a thickness of 3.0 mm, painted externally with a semi-matt and dustproof finish.

The tube has an anti-dusted varnish coating inside it, this work is done to eliminate any kind of internal reflection and allows to have an evenly roughened surface.

All the mechanics are made of Aluminum 6061 with CNC machines and some details are made through laser cutting.

For the focuser, we choose to use one of the most well know instruments on the market: the Feather Touch FTF3215B-A, a True 3-inch focuser.

This incredible and high-precision focuser features a rack and pinion system able to manage high loads capacity without any slippage.

The focuser is equipped with the standard 10:1 micrometric reduction and it can be equipped with any standard Feather Touch motor kit.


Thanks to the most advanced optical and mechanical design software used during the development, the ARTEC series offers a computer-optimized OTA to achieve uncompromising rigidity; all metal parts are CNC machined to guarantee optimal accuracy, ease of use and stability of the collimation.

The ARTEC astrographs deliver stable focus over a wide range of temperatures thus limiting to the minimum they need for iterated refocusing operations – an important condition when using instruments with fast focal ratios during long imaging sessions.

All components are produced using only the finest materials available, such as special lightweight aluminum, stainless steel and bronze.

The sturdy spider of the secondary mirror support is made of laser-cut stainless steel.

The high resistance anodization is chosen for unbeatable resistance to all environmental conditions.

Finally, the generous extraction of the focal plane allows the use of the most challenging imaging trains, whether they are CCD, CMOS or the more popular digital cameras.

New kind of collimation process

The process of mechanics on 250 PRO is really different and more finished than the others, this product uses a new and innovative collimation system that will be used on future ARTEC astrographs with higher aperture, up to 0.6m.

The ARTEC 250 PRO uses only 2 points of collimation on the primary and secondary mirror.

Certified Optics

93%, correction equal to or better than λ/8 and Strehl > or = 0.95

Every optics is complete with a full interferometry certificate.

We recommend the coma corrector which we have tested and proved suitable to fit the optical design of our astrographs.

Some coma correctors can also reduce the focal length, so the system can reach the impressive focal ratio of F/2.8: as every experienced observer can testify, an outstanding mechanical construction is vital for proper collimation and reliable usage of such ultra-fast systems, an area where the ARTEC series sets the standards.

The correctors that we recommend provide a corrected field even at these very fast focal ratios.

Using the ARTEC 250 PRO at F/4.0 with Riccardi Coma Corrector guarantees you a 45mm perfect linear illuminated field; otherwise we test also this system with a full frame CMOS camera without any problem.

Every ARTEC astrograph is fully tested by us before being delivered to our customers, every OTA must follow our high standards and our final tests on the field, under a clear sky, to become your Astrograph.

Delivered accessories

  • Rings for ARTEC 250
  • Losmandy Artesky dovetail
  • Manual Feather Touch focuser FTF3215B-A with 2″ End Cap
  • Optical certificate
  • ARTEC 250 PRO bag

Optical set:Newtonian Astrograph
Primary mirror diameter:250mm
Secondary mirror diameter:102mm
Focal lenght:1000mm
Focal ratio:F/4.0
Mirror material:Quartz
Linear obstruction:41.20mm
Illuminated field:50mm
Dimensions:934 L x 334 W x 429 H mm
Weight:19.7 kg
Tube material:High End Carbon fiber – 3.0mm
Mechanical material:Aluminium 6061
Fan:4 Fan on primary mirror

Estimated delivery time 3-18 days
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Terms and conditions

These terms and conditions are valid from November 7th, 2020.

Contact information

Astro Art Finland
Sinirinnankatu 18
FI-50190 Mikkeli

Telephone: +358442778923
VAT Number: FI32234856

Products are sold for private customers over 18 years of age. Prices include VAT. The prices are subject to change.


Products on the online store are ordered by adding them to the shopping cart and by paying them with an online checkout service. All customer information is handled confidentially. Contact information collected during the order process is only used for the delivery of the order, unless otherwise stated. When placing an order you are required to accept the terms and conditions.

Payment and payment methods

The online checkout service in use is Paytrail. The payment methods are invoice, installment payment, card payment and payment via online bank.

By filling your personal information at the checkout you accept the terms and conditions of Paytrail Oyj
(Paytrail Oyj, Innova 2, Lutakonaukio 7, 40100 Jyväskylä). By clicking "buy" you accept the terms and conditions of Astro Art Store.

Order and payment confirmation

After we have received your order we will immediately send you an order confirmation that contains your order information. Always check the content of the order confirmation. If you have questions regarding your order, contact our customer service immediately. Keep the order confirmation in case you need to contact our customer service. Make sure that you have your customer number and order number available when contacting our customer service. Always make sure that the package contents matches the order confirmation.

You can use the following information to contact our customer service:

Astro Art Finland
Sinirinnankatu 18
FI-50190 Mikkeli

Telephone: +358442778923
VAT Number: FI32234856

Shipping methods and fees

Shipping fees include shipping and packaging fees. We will present an estimate of the shipping fees in the shopping cart. The exact shipping fees are visible when you have chosen your preferred payment method and shipping method for your order. The available shipping methods vary depending on the products and the combined weight of the products in the shopping cart. 

Delivery time

Our most common delivery times to Finland vary depending on the product and delivery method in question. Exceptions to delivery times are stated. We will notify you about the possible delays right after your order.

We are not responsible for delays caused by force majeure or indirect losses caused by delays. The online store will inform about exceptional delivery times on the website.


All of our products have at least a 1-year warranty by the manufacturer. Warranty-related issues can be dealt either directly with the manufacturer or with Astro Art Store. 

Warranty does not apply to faults that have been caused by:

a) incorrect maintenance, lack of maintenance, or lack of calibration

b) software, parts, or equipment that have not been delivered by Astro Art Store

c) unauthorized modifications or misuse of the product

Return conditions

You have the right to cancel this agreement within 14 days without declaring the reason. The deadline for canceling this agreement ends 14 days after you have received the last shipment of your order. If the product is downloaded, the deadline for canceling this agreement is 14 days after you have downloaded the product.

To use your right to cancel, you need to send us an unambiguous notification of your decision (for example by phone or by email). You can also use our printable return form, but it is not required. To comply with the 14-day deadline you need to send the notification before the deadline.

Use the following contact information to send the notification:

Astro Art Finland
Sinirinnankatu 18
FI-50190 Mikkeli

Telephone: +358442778923
VAT Number: FI32234856

Effects of canceling your order

If you decide to cancel this agreement, we will return your payment in full, including the shipping costs (only the amount of the cheapest available shipping method). The payment will be returned without a delay, and within 14 days after you have received the cancellation confirmation.

Return fees are on the responsibility of the customer. The items must be returned to the address of Astro Art Finland with the same method as they have been delivered to the customer. 

We will return the payment by using the same payment method as the original payment, unless both parties agree otherwise. The payment is returned in a way that the you will not get any extra fees.

You must send the items back without a delay and within 7 days of receiving the cancellation confirmation. The deadline has been complied with, if you send the items back before the 7-day deadline.

You are only responsible for such decrease in value of the items that is not caused by handling that necessary to test for operation, features, or functionality of the items.

Unredeemed package

Failure to redeem your delivery is not the same as returning or canceling your order. We will charge a fee for unredeemed orders that have not been canceled according to return conditions.

Problematic situations

If the item has been lost or damaged during delivery or it does not correspond to your order, you need to use our contact information to inform us within 14 days by mail, email or by phone. The contact information can be found in "Return conditions". If the package has clearly been damaged during shipping, you need to inform the delivery company immediately.