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16

You appear to be using your lens (100-400/5-6.3) with the aperture wide open. I would expect the glow in your photos to be significantly reduced or absent stopped down to about F8. Many lenses "glow" when used wide open, especially in bright light with high contrast. It is likely associated with spherical aberration and is typically reduced or completely ...


12

The D7100 body that this lens works with has a focus motor built into the body that connects to a mechanical coupling on Nikkor AF lenses and third party equivalents to move the focus elements in the lens. Your D3300 does not have a focus motor in the body. To use autofocus your D3300 requires that you use Nikon AF-S or AF-I lenses or the equivalent third ...


11

The fact you're seeing this with two very different bodies suggests to me it's in the lens. Long zooms tend to have a bunch of elements (anywhere from a dozen to twenty, in my experience). No lens coating is perfect, and no lens surface is perfect. Every time light passes through an air-glass or glass-glass interface at an element surface, there's a small ...


8

A Tamron lens is my preferred option as I used to have one for my old Minolta when I used 35mm film. That's all well and good; I'm sure Tamron appreciates your brand loyalty. That being said, there are a plethora of good lenses made by Tamron, Canon, Sigma, etc., and a plethora of absolute garbage lenses. Do your homework on a specific lens - the brand ...


7

Is there a reason why Canon and Nikon allow third party makers to make lens that provide similar specs to first-party lens such are AF, IS and aperture control when they sell for less? Controlling a product line that has the support of many third parties is much more profitable than trying to build and sell every product yourself. Canon and Nikon don't just ...


6

Neither of those lenses are really what most macro specialists would consider a macro lens. For a lens to be considered a true macro lens it should be able to project a life sized image of the subject onto the image sensor or film. If you're taking a picture of a 20mm long bug, a macro lens should be able to focus close enough to project an image of the bug ...


6

The Tamron SP 85mm f/1.8 Di VC was introduced in 2016. The Nikon 85mm f/1.8G was introduced in 2012. Most lenses settle into a lower street price a few months after their introduction than the price they command when first introduced. It's still very early to see where the long term price of the Tamron will settle. The most obvious difference is the ...


6

I seem have found the culprit, my single coated 67mm Hama UV filter. I put it on as some point between these two pictures and didn't think it could be the cause because I have never had issues with filters before with any lens. Here are before and after pictures with and without the filter, both at 400mm f/6.3 1/400 ISO250 on my 70D. And 100% crop ...


5

They're red LEDs under the cover. I removed the cover from my 430 EX and whilst it works better (with all lenses, on account of producing a brighter, sharper grid pattern) the light is still red. Here's what it looks like without the cover: It's worth noting that you can in theory remove and replace the cover as necessary but I snapped one off the clips ...


5

TL/DR: You want to look for "for Canon" in the description; and stick with Di and Di II lenses and stay away from Di III. The easiest way to make sure a Sigma/Tamron/Tokina or other 3rd-party lens works with your 60D is to make sure they're in the Canon mount, and that they're new/current versions, or firmware upgradeable to be current. The one big issue ...


5

As you have found out, filters can cause issues. Every time light hits a reflective/transparent surface some light is refracted through the surface and some light is reflected off of the surface. The coatings on lenses and filters are meant to suppress those reflections. Single-coated is better than uncoated, and multi-coated is better than single. The light ...


4

I'm not party to any engineering details and haven't yet used the lens so this is purely speculation, however... The Canon 100-400 (a first party competitor) was originally released in 1998, it's likely that since then manufacturing methods and designs have improved considerably allowing Tamron to produce a lens of good quality for a lower price. Obviously ...


4

Unfortunately, I can't recommend using a teleconverter with the Tamron 70-200mm f/2.8 at all (Update in 2020: The most recent Tamron SP 70-200mm f/2.8 Di VC G2 takes a TC better than the older Tamron 70-200mm lenses do - it's pretty much the equal of the Canon EF 70-200mm f/2.8 l IS II). The lens is pretty good for most of its range, but the weakest image ...


4

Canon filed their patent on the EF mount in 1987, so it expired in 2007. Additionally, clean room reverse engineering to adapt to an interface is not protected by patent. Canikon could block sigma or related just with firmware updates They could, but this would also break compatibility with older Canon lenses. Many 3rd party lenses and adapters mimic an ...


4

Does this make the lens better than an L Lens? It all depends on what way you mean when you use the word "better": Sharper at common apertures and focal lengths? At the center of the frame or over the entire field of view? Less chromatic aberration at a particular focal length and aperture? Less light falloff at a particular focal length and ...


4

You are asking two questions: Is the Tamron 17-50mm f/2.8 a wide angle lens? Does a specific wide angle lens have a benefit over the Tamron 17-50mm f/2.8? I have two answers: The Tamron 17-50mm f/2.8 lens is a zoom lens and covers the range of a wide angle lens as well as a normal lens and depending on the definition you have, can also be considered a ...


4

Yes, assuming: The third party lens is an autofocus lens. The third party lens is compatible with the Canon EF mount. The third party lens is compatible with the 80D with regards to any type of autofocus. Older third party lenses sometimes have firmware issues that make them less than fully compatible with newer bodies. From the lens side of things, there'...


4

Well, shoot. It's stamped right on the zoom ring, in line with the focal length index, very tiny.


4

The only really answerable question in the format we have here is, "How do I compare similar lenses to decide which is best for me? Let's look at the three lenses in question: The Canon EF 70-200mm f/2.8 L USM was introduced in 1995 when 35mm film was still the standard and most of us never dreamed we'd be shooting digital cameras for anything other than ...


3

The biggest differences between the two lenses can be seen at 200mm and f/2.8, but that is where many of us use a 70-200 f/2.8 the most. If you ever plan on using a 2x extender with your 70-200 f/2.8, the difference between the two lenses at 400mm are remarkable. In the end, everyone has to decide for themselves what the relationship is between "close ...


3

VR The Nikkon 18-200 has VR, the Tamron 18-200 does not. VR can give you an advantage worth two or three stops on the aperture. Nikon claim up to four stops There are some relatively cheap Nikon lenses that include VR. For example 18-55mm f/3.5-5.6G AF-S VR DX NIKKOR $197 55-200mm f/4-5.6G AF-S DX Nikkor VR - $247 18-200mm f/3.5-5.6G AF-S DX Nikkor ED VR ...


3

The short answer is yes, they are trustworthy but your question seems to be more orientated towards the 'should you go for the cheaper version' kind of area. In some cases, people would consider the Tamron/Sigma equivalent to be better, but that's subjective and can take into account many things such as build quality, features, price and of course picture ...


3

I have the Sigma 18-50 f2.8 (non-HSM, non-MACRO) Made in Japan and the Tamron 17-50 f2.8 (non-VC) Made in China, both copies are for Pentax K-mount. I would have to warn you about Tamron. The QC is very inconsistent and it really depends on whether you're lucky and get a sharp copy, or like me, who has a back-focusing copy with inconsistent edge distortion....


3

I have been able to try the Canon 2x III extender and Sigma 70-200/2.8OS combination and they do mount and autofocus on the Canon 70D and T5i. The resulting image quality, unfortunately, is beyond the scope of what I can test.


3

There is no way of knowing. You would have to try out the lens on a DSLR to be sure. Many of these older film era lenses from 3rd party manufacturers like Sigma and Tamron had compatibility issues with newer Canon DSLR's. Very often they would work fine wide open but as soon as you stopped down the lens aperture, the camera would lock up and produce an ...


3

There are three issues with compatibility here. Mechanical and electronic Field of View Optical Quality Mechanical and electronic The EOS DSLR mounts should be mechanically compatible with those lenses as they have EOS mounts. However the mount electronics have developed over the years and it is possible, as another poster said, that they will not work ...


3

Keep in mind that the focus distance is measured from the sensor plane to the subject. The distance from the front of the lens to the subject is called the working distance. You might have two lenses with the same Minimum Focus Distance that have widely varying Working Distance. The Tamron SP AF 90mm f/2.8 Di Macro Lens (Tamron lens ID 272) has a working ...


3

Highly unlikely. It's technically possible to convert a lens to work with another brand body, but it involves a lot more than "just" changing out the bayonet flange. The internal electronics of the lens need to be replaced, the travel range of the various control rings will differ between brands, sometimes being actually reversed from another one. And ...


3

From your comments: the colours aren't as bright Colours from cameras are almost entirely down to how the image is processed. The default settings for compact cameras and (particularly) mobile phones tend to have higher contrast and saturation than SLRs, so photos from SLRs can look a bit flat if you're comparing them with those from a compact camera. ...


3

After reading various reviews, you've probably noticed that the general consensus is: Super-zoom lenses compromise on image quality for increased Zoom Range. They typically have reduced Max Aperture, Sharpness, and Contrast. They typically have increased Chromatic Aberration and Lens Distortion. OEM lenses provide better image quality than third party ...


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