Lacerta STM45b Binocular (7-45x magnification, LED illumination)

Product category: Product brand: Lacerta
Lacerta STM45b Binocular (7-45x magnification, LED illumination)

Lacerta STM45b Binocular (7-45x magnification, LED illumination)

Price 369,00 €

Stereo zoom microscope for studies

All 8 model variants of the STM45 series (optionally with bino or trino head, or with or without lighting) have an excellent price-performance ratio. They are optically identical to each other and are equipped with a six and a half times zoom optical system for magnifications from 7 times (field of view: 32mm) to 45 times (field of view: 5mm). The Trino versions in particular (i.e. with a photo tube) are being used more and more often in high school lessons. But these models are also used in hobby laboratories for parasite testing (e.g. fish farming, bonsai), for securing evidence (e.g. private detectives) and in complaints departments (discovering and documenting material defects). The working distance is 100mm.

Stereo microscopes are also known as preparation microscopes because their historical purpose was to make preparations for biological microscopes.

Can be expanded up to 225x magnification

The microscope can be expanded with 0.5x or 2x additional lenses as well as with additional eyepieces (5x to 25x).

With a 0.5x auxiliary lens (optionally available) the microscope works from 3.5x (field of view: 64mm) to 22.5x (field of view: 10mm), and the working distance increases to 165mm. So there is enough space to work with tools. This option is gladly accepted by restorers and in model making, as well as in the workshop (e.g. soldering, repairing small items) and also in the art scene (creating micro-works of art).

If you use a 2x additional lens (also optional), this corresponds to a magnification range of 14x to 90x, but the working distance drops to approx. 35-40mm. In order to achieve the highest possible magnification, the standard 10x WF eyepieces are exchanged for 15x, 20x or even 25x eyepieces. But note that with higher magnification the depth of field decreases rapidly, and above all only flat objects (bank note, print quality, stamp imprint, postage stamps, fine cuts, etc.) can be observed! In general, we can advise you to use a biological microscope above 100x magnification!

As an extreme solution, there is also a 0.3x auxiliary lens with a working distance of 287mm - mostly used by restorers. In this case, however, the stand column needs to be extended (custom-made!).

In stock


  • Stereo zoom lens pair from 0.7x to 4.5x magnification
  • 10x WF pair of eyepieces (results in a total magnification of 7x to 45x)
  • Generous working distance of 100mm
  • 3-inch (76mm) tripod mount
  • Tripod height roughly adjustable and rotatable 360 degrees
  • Additional rack focusing for fine adjustment
  • Upper and lower LED lighting, independently and continuously dimmable
  • The LED lighting does not give off any heat, so the observed object does not heat up
  • Can be expanded in many ways (optically and mechanically)
Your shopping cart is empty

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.