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type: product
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stock_number: "83812-1"
canonical_url: "https://www.artisantg.com/83812-1/ThorLabs-AC254-400-A1"
json_url: "https://www.artisantg.com/83812-1/ThorLabs-AC254-400-A1.json"
generated_at: "2026-11-07T08:47:28.587Z"
last_updated: "2026-10-10T05:35:39.420-05:00"
---

# ThorLabs AC254-400-A1 Unmounted Achromatic Doublet

_Summary and Categories are this item's record. The description sections and FAQ are machine-assisted and can contain errors; where they disagree with the record, the record is correct, and where description sections disagree with each other, Details wins._

## Summary

- Manufacturer: ThorLabs
- Model: AC254-400-A1
- Condition: Used and in Excellent Condition
- Price: $75.00 USD
- Availability: In stock, 1 available
- Warranty: 1-Year Warranty with 30-Day Return Guarantee
- ITAR restricted: No
- Shipping weight: 0.25 lb, estimated
- Shipping dimensions: 8X8X3 in, estimated

## Categories

- Test Equipment > Optical Test > Optical Parts (primary)

## Details

### Includes

- Storage Case

### Configuration

- Focal Length: 400 mm
- Diameter: 25.4 mm
- AR Coating Wavelength Range: 400-700 nm

Part Number: AC254-400-A1

## Images

- <https://www.artisantg.com/itemimages/thorlabs_ac254_400_a1_view1_20241223161851.jpg>
- <https://www.artisantg.com/itemimages/thorlabs_ac254_400_a1_view2_20241223161851.jpg>
- <https://www.artisantg.com/itemimages/thorlabs_ac254_400_a1_view3_20241223161851.jpg>
- <https://www.artisantg.com/itemimages/thorlabs_ac254_400_a1_view4_20241223161851.jpg>