SCVPhotoIdeas-Logo

February 14, 2013

Unique Hejnar PHOTO Arca QR Clamp for Manfrotto 496 / 498 and 054 Ball Heads

Hejnar FM496RC2 QR clamp on Manfrotto 496RC2 ball head
Chris Hejnar of Hejnar PHOTO has been engaged for quite a long time with the design and production of conversion plates for various Manfrotto heads, in order to eneble the mounting of an existing Hejnar PHOTO Arca-Swiss® compatible quick release clamp.

This time we are not talking about a conversion plate but for a unique new clamp designed specifically to fit the Manfrotto 496 / 498 and 054 ball heads equipped with an RC2 quick release.

The QR Clamp
Manufacturer Specification
Model: FM496RC2.......................... .............................
Length: 2.37" (60 mm)
Height : 0.84" (21 mm)
Weight: -- oz (-- gr)
Precision C.N.C. machined from 6061-T6 Aluminium
Black hard coat Anodized.
Made in U.S.A.
.......................................................................................

The Hejnar PHOTO FM496RC2 Arca compatible QR Clamp design is based on the well known Hejnar Photo F62A Quick Release Clamp with an entirely redesigned bottom surface in order to match the specific Manfrotto heads.

Hejnar FM496RC2 QR clamp top-view
The new Hejnar Photo FM496RC2 clamp follows the now recognizable Hejnar clamp design, with deep V shaped safety-stop relief grooves on both sides and a counter sank center hole. Since the clamp is dedicated the hole is not threaded as with other Hejnar clamps and only serves for the attachment of the clamp on the specific Manfrotto ball heads using the original flat head screw (An Allen hex key is provided for this purpose). As all Hejnar Photo products it is machined from 6061-T6 Aluminium and is black hard coat anodized with a glossy finish. Matching the F62 clamp, it has 5 white index marks at 1cm intervals on each jaw, very useful for the alignment of rails and camera plates.
Hejnar FM496RC2 QR clamp bottom-view
The bottom view reveals the grooves and islands around the center hole, that match perfectly the Manfrotto 496 / 498 and 054 ball head stems. Despite the fact that this clamp is by 5 mm higher (thicker) than the other Hejnar clamps, anticipating for the higher islands (bosses) on Manfrotto stems, any excess material has been removed from the bottom in order to minimize the weight.
Otherwise the clamp is identical to the original F62 QR clamp, a strong moving jaw with large tongues moving in minimum tolerance pockets, hidden springs and a black long-shaft screw knob with a brass flange between the knob and the clamp jaw. These attributes mean less friction and no room for dirt or sand making the clamp trustworthy for years of uncompromised service.
Hejnar FM496RC2 QR clamp drawing
FM496RC drawing with detailed dimensions.


Mounting the Clamp On a Manfrotto Ball Head
Unlike the converter / adapter + clamp solutions, now having to deal with only a clamp makes the process of introducing one of the newer Manfrotto ball heads into the Arca-Swiss compatible world, a far easier job.
As an example the Manfrotto 496RC2 head is used for illustration below.
Hejnar FM496RC2 QR clamp, hex key and screw w/ Manfrotto 496 ball head
All one needs to do is to unscrew and remove the original RC2 platform from the ball head stem, using the provided with the clamp Allen hex wrench.
Hejnar FM496RC2 QR clamp aligned on Manfrotto 496RC2 ball head
Align and match the slots at the clamp bottom with the island and bosses on top of the Manfrotto ball stem...

Hejnar FM496RC2 QR clamp fixed on Manfrotto 496RC2 ball head
Then, screw in and tighten the existing flat-head screw. So simple!

I hope you found the information useful, thank you for viewing.
All Photos & Drawings © 2012 Chris Hejnar / Hejnar PHOTO

Price and Availability:
Current price for the FM496RC2 QR Clamp is US$ 70.00 (+Shipping where applicable) and is available from Hejnar Photo store
Check the Recommended Sellers page for a valid Hejnar Photo discount coupon.

Referenced Articles:
Hejnar Photo F62A Quick Release Clamp Review

Relevant Articles:
New Arca Compatible Conversion for Manfrotto 400 Geared Head by Hejnar PHOTO

2 comments :

  1. It also fits the 494RC, the smallest of the RC2 ball heads. I just bought the FM496RC2 for my 496RC and must say that clamp is a nice piece of work. The weird boss on the 496/494RC fits like a glove and feels extremely secure. No glossy finish tho'. Mine is satin black.

    ReplyDelete
    Replies
    1. Thanks for commenting and the info about 494RC2, I'll update accordingly.

      Delete