Question about Sigma APO 50-500mm F4-6.3 EX DG/HSM Lens

2 Answers

Bigma 50/500 as i rotate the the zoom ring it gets grit like and is hard to turn and it is removing paint from the inner tube feels like a rock is under the ring any thing i can do to fix this with out taking it apart like some shim stock to see if i can get the rock

Posted by on

2 Answers

  • Level 2:

    An expert who has achieved level 2 by getting 100 points

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

    Legend:

    An expert who has written 200 answers of more than 400 characters.

  • Expert
  • 480 Answers

Hey Bob G,
I would try blowing compressed air into the lens to try and dislodge whatever is stuck in the lens barrel. If this doesn't work I would advise you to not take the lens apart. Camera lenses require precise mechanical alignment that can only be achieved with the right tools and the education necessary for achieving it. It would probably be easy to take it apart, but very hard to put it back together. You could try a shim, but you run the risk of damaging the lens further. I hope this helps!

Sincerely,
Allan
Go Ahead. Use Us.

Posted on Jun 25, 2008

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 1 Answer

Hi Bob I have the same problem I think. Is there play between the back and front of your housing. I think Sigma should have put more support on the front end of that lens. I drilled a hole thru the mount and tapped the hole to but a bolt in order to take tension off the focus ring and it worked. I know this didn't solve the real problem but the lens is working fine. I bought the lens used and didn't get the original receipt therefore coudn't get the warranty so you do what you have to do. If you need a picture of the modification send me your e-mail.

Rick

Posted on Sep 13, 2009

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.
goodluck!

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Screeching sound during cycle


Check for debris in the pump impeller. Your owner's manual will describe how to
1. Remove baskets
2, Remove wash arm
3. Rotate (inner) lock ring on stainless steel bottom plate to release and remove it.
4. Rotate top impeller by hand to feel for rough spots indicating debris in lower impeller.
5. Rotate motor assembly lock ring to release rotor assembly and clear debris from sump.
6. Reassemble in reverse order and check operation.

This can also occur with a drawer that is not run often (less than once or twice per month) and indicates a dry bearing surface. Most often running a rinse and hold once or twice frees this up and corrects the problem. Drawers work best when operated once a week or more.

Sep 04, 2016 | Fisher and Paykel Dishwashers

2 Answers

2003 mercury sable blows cool air when heater is turned on.


Most likely it is a clogged heater core. Have your heater core reverse flushed or your blend door is stuck open.

Oct 10, 2014 | 2003 Mercury Sable

1 Answer

Inner tube busts on rear wheel


Check for a rock or thorn in the tire. Feel the inside of the tire carefully
There is some thing there that keeps poping the tube. Have fun. Be safe. Vern .

Mar 31, 2014 | Quad Cycling

1 Answer

How to bring back the color....what to put on it????


In this article you will learn the best way to spray paint anything from wood frames auto parts.
Difficulty: Moderate Instructions things you'll need:

  • primer
  • spray paint
  • microfiber towl
  • 300 grit sandpaper
  • 800, 1000,1200,1500 grit wetsand paper
  • 2000 grit wetsand paper
  • clearcoat
  • rubbing compound
  • medium cut polish
  • wax
    • 1

      Start by removing the part that needs to be painted. (You can also tape around it, but be careful about overs pray)

    • 2

      Sand the part with the 300 grit sand paper until the surface is a little rough. This is necessary for the primer to bond with the surface. After sanding wipe down the part with micro fiber cloth.

    • 3

      Lightly spray the part with primer. A few light coats are better than one heavy coat. Make sure to allow proper drying time between coats.

    • 4

      After a few light coats of primer have been applied, wetsand with the 800 grit sandpaper. After wet sanding, wipe again with micro fiber cloth.

    • 5

      Now it is time to apply the color. When spraying the spray paint make sure to use smooth even passes across what is being painted. Do not start painting on top of the part because the paint will be heavier in that area. When painting you want to press and release the button to the side of the product being painted. Again a few light coats are better than one heavy one and make sure to allow proper drying time between coats.

    • 6

      After you are satisfied with the color, wetsand with 800 grit sandpaper and then wipe with micro fiber cloth.

    • 7

      Now it is time for the clear coat. Spray the clear coat the same way as the spray paint. Only one or two light coats are needed. Allow the clear coat plenty of time to dry as this is the layer that you will see most. You don't want any fingerprints on your final surface!

    • 8

      After the clear coat has had more than enough time to dry, You now want to wetsand with the 800 grit, then the 1000 grit, then 1200, then 1500, and finally the 2000 grit sandpaper. This should remove any heavier spots in the clear coat and will polish your painted product up very nicely.

    • 9

      Next you need to remove the scratches left by the 2000 grit. For this you will need to buff the surface with rubbing compound.

    • 10

      Now you need to buff the surface with a medium cut polish to give the surface a nice glassy look.

    • 11

      Whether it be exterior or interior parts that have been painted, I always add a couple coats of wax to the surface. This acts as a protectant to the clearcoat and gives it a nice smooth feel and also helps repel dirt.


The following link contains GREAT plastic stray paint: http://www.krylon.com/products/fusion_for_plastic/

May 04, 2011 | Little Tikes Easystore Large Slide

1 Answer

The blower motor motor has a large rumeling sound and dose not move hardly any air . ED


Turn off power to unit feel or look for lube ports use pliers or similar to remove plugs get zoom spout oiler or put tubing over oil can spout to get oil into ports on motor if no oil ports you may have to replace motor or tear down and lube from inside motor.

Jan 15, 2011 | Heating & Cooling

2 Answers

I have a 2000 Mercury Sable. I put a new water pump on. I'm having trouble getting the heater to work. I've flushed the heater cord both ways. I turn the heater off and let the motor run, then turn the...


have the servo motors in the air control box check and vac.. lines, if it digital controls check conections on the back of controler. good luck!

Jan 12, 2010 | 2000 Mercury Sable

2 Answers

Cleaned paint gun now fan is wide open and does not change with adjustment knob.


I have to assume that this did not happen before you cleaned your gun.

If your sure everything has been cleaned then how about lubricating all the internal moving parts, like your fan adjustment.

I worked in the paint repair department at Chrysler\Jeep. This was not the regular production so we did not use the electrostatic paint guns. We used regular cup guns and touch up guns, including Devillbiss JGAs and HVLPs. The one lesson I learned was the smallest speck of paint, if not cleaned out properly can make a huge difference in the performance of your gun. The reassembly process is also critical. It's not enough to make sure everything is in the right place but also assembled to the correct torque.

If you are still having trouble after a little oil then you should disassemble the gun again. This time (if you didn't do this the first time) make sure you disassemble the tip and air cap and clean them thoroughly. Make sure you have enough tiny brushes to get to all the hard to reach spots. Make sure you have the correct cleaner for the paint you used.
Some solvents\cleaners can turn the paint left inside guns to gel then that turns rock hard requiring you to let it soak overnight.
Again make sure you oil all the internal moving parts.
Hope this helps.

Jul 09, 2009 | RTO Sharpe Finex 3000 Hvlp Gravity Auto...

1 Answer

How to achieve full zoom with a Nikon 55-200mmf/4-5.6G ED lens?!


1) What camera body are you using?

2) I do not understand your assertion that it automatically zoomed in. Zooming is a manual function. The automatic functions of your lens pertain only to focusing on of the subject so that your picture is sharp and ensuring that the correct amount of light is admitted so that you have a correct exposure.

3) Are you sure you were turning the zoom ring and not the f-stop ring? The zoom ring is labeled 200 on one end of the scale and 55 on the other. It is also the widest ring on the lens barrel. When you rotate it, the physical length of the lens will lengthen as you rotate it clockwise (viewed from behind the camera) and shorten as you rotate it counter-clockwise.

4) For reference, at 200mm the angle of view on your lens should be 10 degrees and at 55mm about 40 degrees.

Dec 27, 2008 | Nikon Zoom-Nikkor 55-200mm f/4-5.6G ED...

2 Answers

Repair lens


Needs a clean perhaps - grit ingress - repair shop -will be expensive - of course

Feb 27, 2008 | Nikon D70 Digital Camera with 18-70mm Lens

Not finding what you are looking for?
Sigma APO 50-500mm F4-6.3 EX DG/HSM Lens Logo

Related Topics:

288 people viewed this question

Ask a Question

Usually answered in minutes!

Top Sigma Cameras Experts

kakima

Level 3 Expert

102366 Answers

Steve

Level 3 Expert

3287 Answers

Doberman

Level 2 Expert

254 Answers

Are you a Sigma Camera Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...