Canon 1.4x III live test

Canon 1.4x III live test

In a previous post, we looked at some examples of images using the Canon 1.4x III teleconverter. I’ve noticed that some people looking at the converter were asking about the delays it introduced in focussing.

In day-to-day use the converter adds very little extra weight to the Canon 90 / 70-200 combination. It reduces the maximum aperture from f2.8 to f4.0 and increases the effective focal length from 70-200 to 98-280.

I have not noticed any reduction in focusing speed or focusing options. 

Hopefully this short video will help you see that this is a very impressive piece of equipment.

As the final image showed, the video was made by screen recording Capture One 21 on my laptop while it was connected to the camera using a USB cable and extender. The Joby GorillaPod, which the camera and lens were resting on has lived to fight another day.

Canon Lens Extender Review

Canon Lens Extender Review

Let’s have a look at some images with a Canon 90D, 70-200mkII and a 1.4x extender Mk III

The first image is the ‘actual size’ thumbnails using Capture One 21

images for extender test

Next, the same thumbails zoomed in quite heavily. The woodpigeon is 10m, the young rabbit approx 30m, the BMX cycle track is 1.2Km and the turbines are 9km


The BMX track and turbines were taken with the camera resting on the Trig Point at Croft Hill. The other 2 images were hand held. All images were taken with the the extender in place and are all from Canon RAW files.

Looking at some of the images in Affinity Photo, which access the RAW files may show just how powerful this combination is.

The first images are from reasonably close, and the zoomed in sections in the RAW file are pretty good..

affinity image canon 1.4
affinity image canon 1.4

The next 2 images were taken from Croft Hill in South Leicestershire, supporting the camera and lens on the Trig Point. I used a UV filter, but no polarising filter.

This is the BMX cycle track at Huncote Leisure centre. Bing Maps has an Ordnance survey feature and also a distance measuring feature. This is a zoomed in image at 1,200 metres. The evening light wasn’t perfect and there were a few artefacts in the air. (Artefacts is a word photographers use for ‘stuff’. It’s one of those words like ‘undulating’ used by runners when they mean ‘hilly’).



Now we have the turbines at Low Spinney Wind Farm (these are near the M1 motorway in Leicestershire, England). The Ordnance survey map puts these at 8.9km away in a straight line
The first image shows a very heavily zoomed in part of the image RAW file. IAffinity Photo then ‘developed’ the RAW file to something workable, and you can see the effect of the ‘Haze filter’.  This is an image 8.9km distant on a slightly dull evening!


At nearly 9km the working unit or the turbine is just about visible.

Overall impression of the Canon 1.4x III extender – it’s remarkable. It does reduce your light input by a stop, takes the 2.8 lens to f4 or smaller.
It seems to have no detrimental effect on focus options or focus speed. It’s fairly lightweight. One drawback is that it will only work with the Canon EF lenses with the shorter throw (EF-S lenses will not fit).

Canon Lens Extender Review

Canon 90D Focussing

The Canon 90D is a very, very impressive DSLR and takes a little bit of mastering.
Welcome to the first blog on my new website.


I have a Canon 90D and 70-200II lens for my sports photography work. The continued lockdown in 2020-21 has given the opportunity to fine tune a lot of settings before the sports events re-start.


Here’s an image I managed with this set up – a local buzzard in a local quarry. I estimate the buzzard was something like 200 metres away and the day was slightly hazy.



Capture One 21 generates very high quality images from the Canon raw files and also provides a very powerful set of editing tools. It’s a stunning tool for applying the same edit to multiple images and can save an otherwise poorly exposed set of images.


Here’s the screen grab of the 23MB CRAW CR3 Canon image, showing in Capture One.




The buzzard is taking something like 3% of the image space, so is actually only a 1MB image, maximum. The next screen grab is the same image, being edited in Affinity Photo.
This is not a perfect image, but for this distance in these conditions it’s heading the right way.

The 90D is a bit of a ‘Formula 1’ of Digital SLRs, it’s very capable but takes a bit of getting used to.
There is a fabulous Facebook group, where one of the members posted a bunch of settings to ‘tweak’ the camera for sports work and this whole set of images were taken using those settings. Hopefully, someone on the group wil let me know that they posted this information and I’ll more than happily give credit to them.

Here are the settings:-


90D custom settings
Canon 90D custom settings

A future post will explain some of these settings.
Before that – here are a few resources to check (no affiliate links).
Michael the Maven Youtube 90D tutorial

Canon EOS 90D – Guide to Digital Photography  By David Busch
(Publisher Site)