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05-13-2021, 01:49 PM   #1
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Telephoto adapter plate

I know just about any plate will work. But a 4” plate was recommended for the 150-450 lens because it allows fore-aft adjustments. Just curious what y’all are using and why. I’m using arca Swiss ball head…

JJ

05-13-2021, 02:55 PM   #2
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For the 150-450mm?
Have a browse of the post your 150-450mm photos thread because there is discussion on there (for example around my post #1836).
05-13-2021, 04:35 PM   #3
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QuoteOriginally posted by marcusBMG Quote
For the 150-450mm?
Have a browse of the post your 150-450mm photos thread because there is discussion on there (for example around my post #1836).
I saw that, I’m actually referring to the plate that attaches to the foot…I’ve never used a lens that needed one so this is new for me.

JJ

---------- Post added 05-13-21 at 06:43 PM ----------

Gonna give this a try

amazon.com: Haoge 120mm QR Quick Release Plate Dual Dovetail and D-Ring Screw Fits Arca-Swiss Standard for Tripod Ball Head?tag=pentaxforums-20&
05-13-2021, 04:51 PM   #4
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I just picked up a double arm gimbal for the 150-450. The 120mm plate that came with it is plenty long enough.

amazon.com : Movo GH1000 MKII Heavy-Duty Carbon Fiber Double Gimbal Tripod Head with Arca-Swiss Quick-Release Plate (Latest Version) : Camera & Photo?tag=pentaxforums-20&

Kind of awkward to carry around, I think I'll get a portrait mount gimbal for walking around.

05-13-2021, 05:02 PM   #5
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QuoteOriginally posted by boriscleto Quote
I just picked up a double arm gimbal for the 150-450. The 120mm plate that came with it is plenty long enough.

amazon.com : Movo GH1000 MKII Heavy-Duty Carbon Fiber Double Gimbal Tripod Head with Arca-Swiss Quick-Release Plate (Latest Version) : Camera & Photo?tag=pentaxforums-20&

Kind of awkward to carry around, I think I'll get a portrait mount gimbal for walking around.
Haven’t even thought that far ahead, just wanted to use what I have for now…

JJ
05-13-2021, 05:18 PM - 1 Like   #6
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Off topic a little, but why did they not make the foot Arca Swiss compatible?
05-13-2021, 05:36 PM   #7
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QuoteOriginally posted by ramseybuckeye Quote
Off topic a little, but why did they not make the foot Arca Swiss compatible?
I would assume the feet are universal and that allows either an arca or manfrotto adapter to fit depending obviously what tripod head you have. Now there are differences in foot threads which causes issues as you can imagine.

JJ

05-13-2021, 05:42 PM   #8
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QuoteOriginally posted by jerryleejr Quote
I would assume the feet are universal and that allows either an arca or manfrotto adapter to fit depending obviously what tripod head you have. Now there are differences in foot threads which causes issues as you can imagine.

JJ
I meant so you do not need an adapter, machine the foot as an arca plate, there are some like that.
05-13-2021, 06:08 PM   #9
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QuoteOriginally posted by jerryleejr Quote
I saw that, I’m actually referring to the plate that attaches to the foot…I’ve never used a lens that needed one so this is new for me.

JJ

---------- Post added 05-13-21 at 06:43 PM ----------

Gonna give this a try

amazon.com: Haoge 120mm QR Quick Release Plate Dual Dovetail and D-Ring Screw Fits Arca-Swiss Standard for Tripod Ball Head?tag=pentaxforums-20&
I have something like that. I use it on my Sigma 150-500 and it works well.
05-13-2021, 06:36 PM   #10
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QuoteOriginally posted by ramseybuckeye Quote
I meant so you do not need an adapter, machine the foot as an arca plate, there are some like that.
Would that still fit a manfrotto?

JJ
05-13-2021, 06:52 PM   #11
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I can’t speak of. The 150-450 but the DA560 needs a 168 mm plate to balance perfectly on my gimbal, my MF tamron 200-500/5.6 needs a 100 mm plate. Both these lenses have the mount set a long way off the ideal center of the lens.

---------- Post added 05-13-21 at 09:54 PM ----------

QuoteOriginally posted by boriscleto Quote
I just picked up a double arm gimbal for the 150-450. The 120mm plate that came with it is plenty long enough.

amazon.com : Movo GH1000 MKII Heavy-Duty Carbon Fiber Double Gimbal Tripod Head with Arca-Swiss Quick-Release Plate (Latest Version) : Camera & Photo?tag=pentaxforums-20&

Kind of awkward to carry around, I think I'll get a portrait mount gimbal for walking around.
Watch out for vibration on the gimbal. My Jobo Jr gimbal has a very flexible J arm that adds a lot of vibration to the lens. ( I am using DA 560 and Tamron Adaptall SP 200-500/5.6) and have discarded the J arm and mount the acra Swiss mount directly to the vertical pivot point. Works much better.

The double gimbal looks sturdy but the drop bracket and cross plate will flex a lot
05-13-2021, 07:15 PM   #12
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Don't have the 150-450, but on my 300 I determined (close enough anyway) the center of gravity by attaching it to the camera, setting it on a flat surface with a large dowel under the foot. Then rolled the camera and lens slowly on the dowel and determined the point where it tipped from camera down to front element down. Marked that point on the foot and figured out how long of plate I needed to get that point over the tripod center. I suppose you could do the same at 150 and 450. Then figure out how long of plate you need to get those two points centered on the tripod. It's not exact but better than eye balling it.
05-14-2021, 03:38 AM   #13
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QuoteOriginally posted by DWS1 Quote
Don't have the 150-450, but on my 300 I determined (close enough anyway) the center of gravity by attaching it to the camera, setting it on a flat surface with a large dowel under the foot. Then rolled the camera and lens slowly on the dowel and determined the point where it tipped from camera down to front element down. Marked that point on the foot and figured out how long of plate I needed to get that point over the tripod center. I suppose you could do the same at 150 and 450. Then figure out how long of plate you need to get those two points centered on the tripod. It's not exact but better than eye balling it.
The issue is on many lenses, like my DA560 and Adaptall 200-500/5.6 is that the foot design is a) not long enough, and b) in the wrong place, to do this. In both the cases, the CofG is beyond the foot. On the DA560 I actually think the designers simply screwed up, because the lens would be much more balanced if the foot was mounted in the opposite direction.

Note, on my Sigma APO 70-200/2.8 EX the foot can be reversed and this is useful in achieving balance with and without teleconverter attached.
05-14-2021, 04:36 AM   #14
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QuoteOriginally posted by jerryleejr Quote
Would that still fit a manfrotto?

JJ
Only with an adapter
05-14-2021, 04:39 AM   #15
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Benro PL85 is the smallest plate I found usable. I milled out some of the aluminum to get a bigger second screw in there, so it is attached more rigidly. Definite CoG issues with some combinations.
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