Askar
Askar M54/M48 Backfocus Adjuster
Askar M54/M48 Backfocus Adjuster
Couldn't load pickup availability
In daily astronomical shooting, the backfocus will have an influence. Astronomical photographers are often frustrated by the change of backfocus due to various reasons such as refraction of filters or when using some products with sensitive backfocus. To solve this problem, ASKAR launched the backfocus adjuster, (providing the adjustment range from 16mm-20mm), which can be adjusted ± 2mm of the backfocus. We offer two specifications for the backfocus adjuster, the camera side adapter M54 and M48, which are convenient for users to choose from.
Product introduction
The M54 backfocus adjuster's front telescope interface is female thread M54x0.75 and the rear camera interface is male thread M54x0.75, the overall thickness is 18mm and offers ± 2mm adjustment range.
The M48 backfocus adjuster's front telescope interface is female thread M54x0.75 and the rear camera interface is male thread M48x0.75, the overall thickness is 18mm and offers ± 2mm adjustment range.
The backfocus adjuster is CNC machined. Each unit is a 0.05mm precision adjustment, the surface is printed with a scale for easy adjustment and to save the position. There are two holes for fixing screws, which make the adjuster easy to use with different products.
By rotating the backfocus adjuster, it can be adjusted between ±2mm to match the backfocus requirement, and to solve the various imaging problem caused by the backfocus.
Users just need to choose according to their product's rear adapter.
Specifications
|
Product Size Diagram |
|
M54/M48 Backfocus Adjuster Installation |
Got a question?
what we get asked most often
Are the prices all-inclusive?
Yes. The price you see is the price you'll pay. All taxes are included. Free shipping on all orders.
What's the stock status of the products on your site?
We list only in-stock items on our website that can be shipped right away. Sold out products are out of stock, so you can't place an order.
Selected products are available for Preorder, with a guaranteed delivery within 30 days or your money back.
How fast do you ship?
We process and ship all orders within two business days. Shipping time is determined by the speed of the shipping partner.
Is there a guarantee on your products?
Yes. On top of the manufacturer's warranty, we also offer a Replacement Guarantee on all online orders. In the event that the product is defective or damaged during shipping, you will receive a replacement.
Can I cancel my order?
We'll refund you 100% if you cancel before dispatch. Cancellations after dispatch are complicated. Take a look at the our Policy here
What's your return policy?
We have strict return/refund policies as a company that deals with fragile products. Casual returns are not permitted. Items that are not damaged in transit or defective cannot be returned.So please take a moment to review our Refund Policy.
Could I order something that's out of stock or not listed?
If you are interested in ordering an out-of-stock item, click the "notify me" button. You will be notified when the item is back in stock.
To source a specific product for you, our team needs more information. Specific orders will be subject to case-by-case terms and conditions.