October 25, 2011

A versatile LLSB idea for push-pull zoom lenses (Part 4)

Long Lens Support Bracket for push-pull zoom lenses overview
Having in mind, for a gripped or pro camera with a long push-pull zoom lens, so the camera body would be able to move above the LLSB rail when the lens is zoomed in and out, led me to a more complex solution which allows ample height, easy regulation for different lenses, as well as the ability to zoom the lens on the spot.

Thus a long rail, an LLSB and three quick release clamps are needed to realize this idea.
Again a prerequisite for this solution is that the lens is already equipped with an Arca Swiss® compatible lens plate.

Long Lens Support Bracket idea for push-pull zoom lenses components
This idea was based on the Hejnar Photo LLSB-P1A package, which contains one G13-80 rail, an LLS Bracket and the new F012A quick release clamp. As usual the package icludes two 1/4"-20 captive screws, one 1/4"-20 flat screw, one dowel pin and two Allen hex keys in the package. The F012A clamp is identical to the F012 clamp as described in my Hejnar Photo F010A & F012 Quick Release Clamps Review, except for the smaller black knob.
Hejnar Photo F010A and F012 Quick release clamps+bushing+screw
In addition to the above package, two extra quick release clamps are needed like the Hejnar Photo F010A & F012 Quick Release Clamps or a set of two F012 quick release clamps, together with an 1/4" to 3/8" thread conversion bushing and one 1/4"-20 flat screw in order to be attached back to back.
Hejnar Photo G13-80 rail & F012A Quick release clamp + dowel pin
Next we need to put the LLSB together, starting by inserting the alignment dowel pin in the front hole, on the bottom side of the F012A clamp.
Hejnar Photo F012A Quick release clamp on G13-80 rail front
Using the 1/4"-20 flat screw and appropriate Allen hex key the clamp is screwed and simultaneously aligned in the rail's front hole.
Hejnar Photo LLSB-R2 in F012A Quick release clamp on G13-80 rail front
Once again the LLSB is inserted and clamped at the lowest position, until the lens is mounted so as to adjust the correct height accordingly.
Hejnar Photo F010A and F012 QR clamps w/ bushing installed
After screwing the 1/4" to 3/8" thread conversion bushing in the center hole of one of the clamps...
Hejnar Photo F010A and F012 Quick release clamps back to back
...it's easy to screw the other clamp with the 1/4"-20 flat screw back to back.
Hejnar Photo F010A and F012 QR clamps back to back on rail end
Then slide it in, on the rear side of our LLSB rail.



Hejnar Photo F010A and F012 QR clamps w/ lens plate closup
Creating in this way an elevated sliding platform for the zoom lens' dovetail plate, which should already be attached on the lens' collar foot.
Long Lens Support Bracket for push-pull zoom lenses assembled
The Hejnar Photo LLSB-P1A package, as described in the beginning of this part, weighs 275gr (0.60lb) and costs as a package US $ 129.00 plus shipping.
This idea of complete LLSB with the elevated sliding platform weighs 474gr (1.05lb) and as a package, according to my estimates, will cost around US$ 229.00 plus shipping.

Following is a short video comprised of different views of this versatile LLSB. You can Click to view and follow on screen instructions for navigation.


In the next short video you can view the ability of zooming out, a push-pull type lens like the Canon EF 100-400 IS USM,  while the front element remains supported on the LLS bracket.


Except for above solutions depicted with the Hejnar Photo 8" long rail, there are available rails, 1/2" thick with front hole, ranging from 4" to 12" in length, which combined with the Hejnar Photo Lens Support Bracket and various quick release clamps, can form a solution for any camera/lens combination and any budget. That's why I like Arca Swiss® compatible modular systems, you can start with a rail and build up a whole support system.
Needless to mention that all above LLSB solutions may be used on ball and gimbal heads alike and any head equipped with an Arca Swiss® compatible quick release clamp.


Check also the articles for previous Parts 1, 2 and 3 below.

Part 1
Ideas for a Long Lens Support Bracket
Part 2
The Basic Long Lens Support Bracket idea
Part 3
A versatile Long Lens Support Bracket idea





I hope you found the article and ideas useful, thank you for viewing.
All Photos & Photosynths: © 2011 S.C.Vlachos

Availability:
The above mentioned components are available from the Hejnar Photo online store in the Lens Support section

If you are interested in the product, do check the Recommended Sellers page for a valid Hejnar Photo discount coupon before ordering.

Referenced Articles:
Hejnar Photo F62 Quick Release Clamp
Hejnar Photo F69 Captive Quick Release Clamp
Hejnar Photo F010A & F012 Quick Release Clamps

Relevant Articles:
Create a Heavy Duty Long Lens Support Bracket
Sunwayfoto YLS-01 Y-Type Long Lens Support Review

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