There have been many ways of attaching two rails perpendicular to each other. Either involving screws or angled blocks, or a combination of both, as well as QR clamps.
None up to now has involved two Arca-Swiss® compatible quick release clamps set in a right angle between them, yet directly CNC machined from a single block of Aluminium.
|Height:||17.25 mm (0.68")|
|Width w/ Screw Knobs:||72.52 mm (2.85")|
|Jaws' Length:||50.00 mm (1.97")|
|Long Side Length Clamp A:||67.25 mm (2.65")|
|Short Side Length Clamp B:||55.00 mm (2.16")|
|Center Mounting Hole Thread:||3/8"-16|
|Metal Conversion Bushing:||3/8"-16 to 1/4"-20|
|Weight:||159 gr (5.6 oz)|
|All Metal construction:||Aluminium|
The D290 double QR clamp is a very versatile solution for connecting any two Arca-Swiss® compatible multipurpose or dedicated use rails in a right angle.
|The screw knob stems have been minimized having in mind the least possible obstruction when and if the clamp will be used on a panorama rig as we shall see later on.|
The Evolution of the Clamp
As I have been part of the evolution of this innovative clamp, I happen to have some preliminary prototypes in my possession, which may give a clue to my readers about the different stages a new product comes through, before reaching the market.
The D290 double skeleton right angle quick release clamp was tested with various camera plates and lens plates, as well as with multipurpose long rails of various thicknesses and widths. Plates / Rails tested were from Benro, Desmond, Kiwi Fotos, Fotoporo, Marumi and Hejnar PHOTO, without any issue whatsoever.
For the readers that like numbers, I hereunder quote detailed measurements of the clamp Jaw dimensions, so as they can decide whether this clamp is compatible with the dimensions of their plates or rails.
|Clamp Jaw dimensions in mm||Clamp A||Clamp B|
|Steady Jaw Height||05.30||05.20|
|Moving Jaw Height||04.96||04.93|
|Min Jaw Lip Opening||31.80||31.88|
|Max Jaw Lip Opening||36.06||36.35|
|Min Base Opening||39.97||39.95|
|Max Base Opening||44.12||44.38|
|Desmond D290 Clamp A on the left and Clamp B on the right as assigned for differentiation purposes.|
All dimensions fall within the average limits, consisting the clamp compatible with almost all variations of Arca-Swiss® type plates and rails.
Therefore, I can confirm Desmond's claim that the clamp will accommodate any Arca style rails from various makers including: Really right stuff (RRS), Wimberley, Sunwayfoto, Desmond, Arca Swiss, Kirk Enterprises, Markins, etc.
Further, in my load test nothing moved, nothing slipped, it held any rail rock solid.
Using the D290 Double Clamp...As part of a Panoramic Rig
The D290 Double 90° Right Angle Clamp besides its many possible applications, actually came to complement the New Budget Line of Nodal Slides and Multipurpose Rails from Desmond as the missing connecting piece between them.
|The D290 Double 90° Right Angle Clamp is pictured above, teamed with the DLR-2502 Multipurpose Rail, the DLR-2002 Skeleton Multipurpose Rail and the DNR-180 Nodal Rail with integral QR clamp.|
More information about the assembly of a Desmond Multirow Panoramic Rig will be available in a dedicated article, as well as in the Desmond DLR-2002 Vertical Multipurpose Rail Review as soon as time permits
Original and innovative design.
Very low weight for the clamp type and size.
Exceptional machining, finishing and anodizing quality for the price.
Good fitting with small tolerances.
Very smooth operation.
Excellent value for money.
None found up to the time of this review.
In many of the first Desmond QR Clamp reviews I made some critical comments about their geometry and weight. However, after the introduction of the Desmond DAC-X1 Skeleton Quick Release Clamp, Desmond team seems to have succeeded entering into a new era with a vast improvement over their original QR Clamps.
Since the D290 is based on the DAC-X1 QR clamp which is the best Desmond's clamp in geometry so far, so is the D290 ranking among the best Desmond clamps I have tested up to now.
I believe this clamp is very innovative, while combined with the Desmond quality standards and a very low price tag, it offers excellent Value for Money!
Note : The D290 Dual 90° Quick Release Clamp presented in this article was kindly offered by Desmond Photographic Distribution, USA, for evaluation and review.
I hope you found the review useful, thank you for viewing.
All Photos: © 2014 S.C.Vlachos
Price & Availability:
Current price for the D290 QR Clamp is US$ 39.97 (+Shipping where applicable) and is available from Amazon.com
Further current prices for Desmond DNR-120 and DNR-180 Nodal slides are US$ 29.95 and US$ 39.95 respectively, while for Desmond DLR-2002 and DLR-2502 are US$ 29.95 and 39.95. All rails are available from Amazon.com
If you are interested in the product, please consider using above link(s) to make a purchase and help support this site.
New Budget Line of Nodal Slides and Multipurpose Rails from Desmond
Desmond DLR-2502B Multipurpose Rail Review
Desmond DLR-2002 Vertical Multipurpose Rail Review
Desmond DNR-120 and DNR-180 Nodal Slides Review
Desmond DLVC-50 Skeleton Lever Release Clamp Preview
Desmond DAC-X1 Skeleton Quick Release Clamp Review
Desmond DBC-50 50mm Dual Subtend QR Clamp Review