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Denkmeier D21 Eyepiece Pairs

Denkmeier D21 Eyepiece Pairs - 1.25"

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Estimated Arrival: Between Nov 29 and Dec 05. *ETA to USA Only

Shipping & Returns: Satisfaction guaranteed 30 day return policy.


The Denkmeier highly rated D21 Eyepieces are matched to 1/100th focal length. Typically 21.6mm with a 65 degree AFOV, and of course are fully multi-coated. They exhibit NO pin cushion distortion and produce amazing contrast whether used  for nightime observations of planets, lunar and deepsky or daytime views in white light and H-a. They are amazing for H-a observations. We feel that the D21s are UNSURPASSED for contrast and sharpness on Ha!

Photo shows our D21 Eyepieces in a Binotron 27 Super System with Filter Switch (not included with D21 Eyepieces)


Available focal lengths

21mm & 14mm

Eyepiece barrel format



65 degrees


Fully multi-coated on all air to glass optical surfaces for ultra high-efficiency transmission


High index Japanese glass




Black anodized aluminum housings & barrels with rubber knurled grip


Rotating batwing


8 oz


Full one-year



We know that once you've placed your order, you are anxious to receive it! We make every effort to get your order shipped out to you as quickly as possible.

As soon as you place your order, you will receive an order confirmation e-mail. This means that we have received your order in our system and pre-authorized your credit card for the purchase. We will process the charges to your credit card and your order will ship within five business days from the date of your order. We will send you tracking information within 24 hours of your order leaving the warehouse to the e-mail address you provided when checking out.  If you do not receive tracking information from us within six business days of your order, feel free to follow up with us at

Standard shipping time in the US is between 3-5 business days, though it can vary slightly depending on the destination. We typically For updates on your shipment you can enter your tracking number here.

We distribute nationwide via UPS and Fedex. Unfortunately, at this time we are not able to provide expedited or international shipping.