Arky

Arky

Lives in United States AR, United States
Joined on Feb 19, 2005

Comments

Total: 11, showing: 1 – 11
On Focus_lens_circlip photo in Arky's photo gallery (1 comment in total)

At this point attach the lens to a camera and power it up. Set the lens on MF and turn the focus ring until the floating element is fully forward as shown in this shot. Turn off camera and remove lens.
After removing the indicated circlip the focus lens will slide out of it's cell for cleaning.

Direct link | Posted on Mar 30, 2014 at 22:24 UTC as 1st comment
On Rear_set_screws photo in Arky's photo gallery (1 comment in total)

The rear lens barrel (containing all of the electronics) can be unscrewed from the front lens barrel after loosening the set-screws hidden under the manual focus ring.
Slowly turn the focus ring while looking through it's access hole to locate then loosen the underlying set-screws. Note that the lens is tapped in four places for four set-screws. In my lens at least, only two of these threaded holes actually had set-screws in them.

Direct link | Posted on Mar 30, 2014 at 22:05 UTC as 1st comment
On Front_set _screws photo in Arky's photo gallery (1 comment in total)

You can loosen the 6 front barrel set screws and use a lens spanner wrench on the front element to remove the entire front inner barrel. Conversely, you can tighten these 6 set screws securely and use a lens spanner wrench to remove the front protective element only without turning the inner lens barrel.

Direct link | Posted on Mar 30, 2014 at 21:33 UTC as 1st comment
On Retaining_ring photo in Arky's photo gallery (1 comment in total)

Loosen the 12 set screws in the retainer ring for the tripod mount sleeve.
Unscrew the retainer ring by turning counter-clockwise just like the beauty ring.
The tripod mount sleeve will now slide off of the lens to allow access to the set screws for the front inner lens barrel.

Direct link | Posted on Mar 30, 2014 at 21:11 UTC as 1st comment
On Detente_screw photo in Arky's photo gallery (1 comment in total)

Remove the detente screw and the underlying spring and ball. This screw has a square shoulder so if you don't have the correct tool you can use vise-grips or pliers to remove it.

Direct link | Posted on Mar 30, 2014 at 20:30 UTC as 1st comment
On Foot photo in Arky's photo gallery (1 comment in total)

Remove the 4 screws and the tripod foot.

Direct link | Posted on Mar 30, 2014 at 20:28 UTC as 1st comment
On Beauty_ring photo in Arky's photo gallery (1 comment in total)

Loosen the 4 set screws and screw off the beauty ring counter-clockwise. You may need to tape the beauty ring to the tripod mounting ring and turn both together to get a good enough grip to break it loose and get it started turning.

Direct link | Posted on Mar 30, 2014 at 20:27 UTC as 1st comment
On Components photo in Arky's photo gallery (1 comment in total)

In order to clean the back side of the front protective glass element you will need to pull off the protective rubber ring around the front of the lens.
You will also need to verify the front barrel set screws are either tight - to remove the front element only, or loose to remove the entire front inner barrel from the front outer barrel. In order to access these front barrel set screws the tripod mounting ring must be removed.
The next few images will show the steps necessary to remove the tripod mounting ring allowing access to these set screws.
If you only need to access the focusing lens you can skip these steps and proceed to the image of the rear set screws.

Direct link | Posted on Mar 30, 2014 at 20:25 UTC as 1st comment
On Ring of Fire in the Firearms challenge (21 comments in total)
In reply to:

Mike Ronesia: Nice, how many tries did it take?

I would guess about 500 rounds were fired while the the camera was shooting at 8 FPS. Thousands of frames were captured in the process. This image is solely due to persistence and luck. With the camera shooting 8 FPS the chances of catching the bullet within 6 inches of the barrel is about 1 in 212.

Direct link | Posted on Jun 23, 2012 at 18:13 UTC
On Ring of Fire in the Firearms challenge (21 comments in total)
In reply to:

old_slowhand: interesting, did you use an acoustic trigger? perfect timing, anyway.

No acoustic trigger was used. Even if the sound was detected instantaneously the shutter lag of 40ms would allow the bullet to travel 34 feet before the shot could be captured by the camera.

Direct link | Posted on Jun 23, 2012 at 17:51 UTC
On Ring of Fire in the Firearms challenge (21 comments in total)

Thanks everyone for your kind comments.
You may also be interested in 2 more similar shots I've entered in the "Fast Movement shot for anything" challenge.
http://www.dpreview.com/challenges/Challenge.aspx?ID=6915

Direct link | Posted on Jun 23, 2012 at 17:29 UTC as 1st comment
Total: 11, showing: 1 – 11