The 4.5" Pump Vacuum Cup from Matthews comes equipped with a single 5/8" pin. The cup will adhere to a reasonably flat, non-porous surface. Just pump until the red marker line disappears into the cup.

Use on any Non-Porous Surface

Related Questions and Answers

Q: 1. What can you do for lens covers with this lens?

A: There are lens caps included with this lens.

Q: 2. is there any way to attach a ring light to this lens?

A: The lens doesnt have a front filter thread, so there would be no way to attach a ring light to the lens. Though, with a minimum focus distance of .79 (20 mm), you would likely be looking to find some lighting coming from the side. Or, if the item being photographed is relatively translucent, you might also consider lighting it from the back.

Q: 3. Will this lens work with an aps-c camera? sony a55v

A: Yes the sensor size will crop the image the lens captures so there may be a small difference between the image you see in the view finder and the image the sensor captures.

Q: 4. Can this lens be used on a crop sensor Pentax like a Ks2?

A: Yes this lens can be used on a Pentax camera such as the K-S2.

Q: 5. One review mentioned using a focusing rail? What is he talking about?

A: This is a manual lens, so, to get the focus point, you need to move the camera or the object.The focusing rail todo this, to move the camera back and forward instead finding the focus.

Q: 6. How would focus stacking work with this camera, say on a Panasonic GH5s?

A: If any lens required focus stacking, it would be this one. Very high magnification and super shallow depth of field. Yes, focus stacking would be ideal for this lens.

Q: 7. Does it work with the a7rII?

A: Yes, this lens works with the A7R2.

Q: 8. Can you use the build-in focus stacking function of the Xt camera or would you have to move the subject to do that?

A: You have to manually focus or move the camera or the subject for focus stacking.

Q: 9. I need to photograph something that is 4.5mm across with a Canon 700D (APS-C). Will this lens cope?

A: Yes, this Mitakon Zhongyi 20mm f/2 4.5x Super Macro Lens for Canon EF will be a 32 mm equivalent on a Canon 700D APS-C DSLR camera and it will be ideal in your case.

Q: 10. I'm trying to use this on my canon 6d but I can't see anything and it says f00. Am I doing something wrong here?

A: First, this is a manual lens with no electronic contacts to communicate with newer camera bodies. As such, the camera cannot know what the aperture setting is. As the manual suggests, one should use the maximum aperture when taking pictures: the aperture on the lens (which is the ring on the front of the lens), NOT the cameras aperture setting. The proper shutter speed would be set by the camera under the cameras manual setting. My Nikon lets me know when the subject is in focus, but it is better to move the camera into focus (using a macro focusing rail, or something similar) or focusing using the magnification lens ring. This lens is a very limited use kind of lens: to take extremely magnified images _only_ at close range that are not typically achieved with conventional macro / micro lenses. Do not expect this to act like or be as utilitarian as a regular lens; do not think of this as a regular 20mm lens.