Top 20 Tamron 75-300mm f/4.0-5.6 LD Lens for Nikon AF Questions & Answers

A 35-80 mm lens is 2.3X zoom. Divide 80 by 35 and you'll get the result.It is usually better to know what the focal length of a lens in "35 mm equivalent" is and judge by that, rather than relying on the "X" power of the lens. For instance, most point and shoot cameras start at about 35 mm and have either a 3X or 4X zoom. This would make it a 35-105 or a 35-140. I've seen some that start at 28 mm, though. A 3X starting at 28 mm is 28-84 and a 4X is 28-112. Neither one is a particularly strong telephoto lens and the 4X is just about the same as the 3X that starts out at 35 mm.It's also important to realize that tradition dictates that lens focal lengths are usually expressed in terms of "35 mm equivalent," where "35 mm" refers to a 35 mm film camera. This is because of the relation between the sensor size and the actual focal length of the lens and the resultant angle of view of the lens.I have one point & shoot that is actually a 5.8-24 mm zoom. This is a 4X zoom. The 35 mm equivalent is 28-116 mm. The sensor is 7.2x5.3 mm. (1/1.8") (And I wish I knew someone who could explain how the heck they came up with sensor size terminology!)I have another point & shoot that is actually a 5.7-17.1 mm zoom. This is a 3X zoom. The 35 mm equivalent is 34-102 mm. "How could a shorter focal length give a longer 35 mm equivalent?" you might ask. It's because the sensor is only about 5x4 mm. (1/2.5")I have a few Nikon DSLR's and - thankfully - they all have the same size sensor. They all have a "lens factor" of 1.5. This means that you just multiply the actual focal length of the lens to get the 35 mm equivalent and then you can make comparisons accurately from camera-to-camera. Most Canon's, for instance, have a lens factor of 1.6. On a Nikon DSLR, a 28 mm lens is the "35 mm equivalent" of a 42 mm lens. On most Canon DSLR's, the same 28 mm lens is the equivalent of a 45 mm lens.These example are just to show you how freaking confusing it can all become if you try to make sense of the "X" power of a zoom lens.Bottom line...Check the 35 mm equivalent specifications for the lens. This way, you will be leveling the field and comparing apples to apples. More or less.

This lens has a zoom ratio of 4 :1 or 4 times.

Basically 75mm x 2 = 150mm
150mm x 2 = 300mm
I hope that helps,
Ian

That lens doesn't have an internal focusing motor and thus will not autofocus with the D40x. Nothing is broken.

Set up focus point using autofocus, then set camera to manual focus before attaching filter, and be careful not to move focusing ring.

First, I'm not a TAMRON Tech. * Check your warranty and call for service. * Ah, Found this on you tube. (VERY Technical!) https://www.youtube.com/watch?v=o9dvQmVAhK0 * Strongly suggest you have this lens serviced. Aloha, ukeboy57

You'll need to send it to a lens repair service. Do not attempt to disassemble the lens yourself; you'll only make the problem worse and may damage the lens beyond repair.

Use the settings that will give you the best exposure / shutter speed / focus

Tele convertors on their own do not focus - that is achieved by the lens. Are the lens contacts clean and correctly aligned with those in the camera ?

This is a bit off the wall, I know, but have you contemplated taking the drastic step of getting the lens mended ?

Go to the tamron site and find the nearest repair centre to you location

This is the UK service centre http://www.tamron.eu/uk/service/repair-service/

After doing a Google search this link may help you: https://www.google.com/search?client=safari&rls=en&q=tamron+lens+repair&ie=UTF-8&oe=UTF-8

Using Google search I came with this link: https://www.google.com/search?client=safari&rls=en&q=tamron+lens+repair&ie=UTF-8&oe=UTF-8

all of my Tamron lenses have the serial number on the barrel of the lens right next to the "Made in Japan" label. When the lens is in the camera the MIJ label is on the bottom side. I hope that helps with your lens

Did you switch the AF / MF switch to AF (Auto Focus)? It is on the lens.

Repair manuals can be bought by certified repair centres. Sometimes you get the manuals when you have done the repair course at the firm. Not sure Tamron does so. But they most of the time don't sell these manuals to normal people, to avoid they start opening a lens, because they never will be able to put it together as a working lens, without the tools, like a collimator.

Simple idea? Dont go to F32..just stay at F22 and increase the camera speed one stop. A little test will give you right calibration

No. The LA-DC58K only allows you to use the TC-DC58K teleconverter with your camera. The Tamron 28-200mm lens is intended for use with SLR (single-lens reflex) cameras, not with point&shoot cameras. As far as I know, there aren't any adapters which will allow you to use an SLR lens with the G10. A teleconverter is an add-on accessory that works with an existing lens. The 28-200 is a lens, which is intended to be used as-is. Using it on the G10 would basically require removing the built-in lens on the G10. As that lens can't be removed...

What mount do you have on the Tamron lens? (The built-in mount.) If it has a Nikon mount, you don't need an adapter at all. If it has the Adaptall mount then the adapter should fit onto the back of the lens, then the combo should fit onto your Nikon camera. If the lens has a different mount then nothing you can do will make it fit.Does the adapter fit onto the lens?

If you got a lens with a Nikon mount then you don't need anything else to fit it to a Nikon camera.