How to convert a Symmar 240mm to 420mm.

[einar_faret_saastad]

I saw the question and answers for this similar subject of april 10.

I have this lense myself, but I need some advise on how to detach the

front of the lense. Are there any screws to loosen

[andrea_milano]

under normal circumstances, not, however some lenses might be mounted

with retaining rings or screws .

[s.k. grimes inc]

The lens groups unscrew from the shutter like a bottletop from a

bottle. Turn counterclockwise to loosen.

 

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They are often stuck in place and require a fair amount of force to

loosen if they are in that condition.

 

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Steve Grimes. <a href="http://www.skgrimes.com"> www.skgrimes.com

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[dave_willison]

My 300/500 Convertible Symmar is converted by unscrewing the front

element. I would suggest that you do this with the lensboard/lens off

the camera and stationed on a padded surface. I don't convert my lens

often but I recall that it seems to take forever to unscrew and then,

all of a sudden, the front element comes off! The front element on the

300/500 is a big chunck of glass and I recall almost dropping it while

attempting an on-camera conversion. Hope this helps.

 

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