Teleconverters (Page 6): Good info :sm18:...

joecichjr Loc: Chicago S. Suburbs, Illinois, USA

Architect1776 wrote:

I have the MIII converter, designed specifically for this lens and a select few other lenses.
No softness so cannot see what your issue is in this regard.
The first photo is with a 2X converter and 800mm.
The second is with the 2X converter at 200mm.
Both with a 7D
Building was at least 1/4 mile away.
There is no "Softness" as you can see.

Good info

no12mo

rcarol wrote:

An example of one of your images would help us help you.

Why do we have to keep asking for pics?

robertjerl Loc: Corona, California

lmTrying wrote:

I thought mirrorless cameras did not need micro focus adjustments due to the elimination of the mirrors. That was a part of the reason I upgraded from a Canon XSi to an RP instead of a 80D or 90D. (Plus a lot of other reasons.)

Never used a Canon mirrorless but others have come on and said the R series cameras do not have micro adjustment as an option. Now I know something new.

pmsc70d Loc: Post Falls, Idaho

I did exactly the same thing with the same equipment. Had the same results. The picture was sharper if I simply cropped the image without the converter. I returned it.

VietVet Loc: Brooklyn, NY

robertjerl wrote:

Never used a Canon mirrorless but others have come on and said the R series cameras do not have micro adjustment as an option. Now I know something new.

Never too old to learn something new Robert. I was surprised when I first got it.

MJPerini

Is it the same on the mirrorless and DSLR ? If if is just the DSLR you can set an AF Micro Adjust offset for the Lens + Converter.
If the combo is better on the R, then AF Micro adjust is a real possibility for the 7D
I would also Call Canon to ask if using the older lens with the newest converter could possibly be a mis-match of some sort. That shouldn't be the case, but perhaps the Converter series II might bee more compatible.
Since you are away it is a long shot, but is there any chance a local Camera shop might let you try a different converter?
Good Luck

robertjerl Loc: Corona, California

pmsc70d wrote:

I did exactly the same thing with the same equipment. Had the same results. The picture was sharper if I simply cropped the image without the converter. I returned it.

Well, I do a lot of small birds and need the extra reach at times. And the results are still more than acceptable.

I also do hummingbirds with a Tamron 180 macro + Kenko Pro-300 1.4x and when I do my part the results are very good.

Architect1776 Loc: In my mind

elliott937 wrote:

I, too, am surprised. I use only my L-series lenses (all three of them), yet I've used the 2.0 tel converter, and I've captured a very detailed image of a castle up high on the hills of the UK. Don't give up.

Architect1776 Loc: In my mind

lmTrying wrote:

I thought mirrorless cameras did not need micro focus adjustments due to the elimination of the mirrors. That was a part of the reason I upgraded from a Canon XSi to an RP instead of a 80D or 90D. (Plus a lot of other reasons.)

You are correct.

Architect1776 Loc: In my mind

joecichjr wrote:

Good info

photodoc16

robertjerl,
Ok. Tell me this. Does a 1.4X TE on a 180mm macro turn it into a 252mm macro so you can stand further away or does it change the level of magnification by a factor of 1.4? And, by the way, is there a market for Macro lens extenders?
Confused,
Photodoc16

robertjerl Loc: Corona, California

photodoc16 wrote:

robertjerl,
Ok. Tell me this. Does a 1.4X TE on a 180mm macro turn it into a 252mm macro so you can stand further away or does it change the level of magnification by a factor of 1.4? And, by the way, is there a market for Macro lens extenders?
Confused,
Photodoc16

180 x 1.4 = 252mm, then put it on my 7DII and I get an angle of view of a 403.2 which is very good for hummingbirds at a feeder about 8-10' away. And it has a resolving power above almost all non-macro lenses. Not to mention being lighter and an f/5.0 (f/3.5+extender=f/5) so a little faster than my 100-400L Mk2. Just not as versatile since it is a fixed focal length.

Macro lens extenders, I know of no extenders made just for a particular macro lens. The one I have been using with the Tamron 180 f/3.5 Macro is a Kenko Pro 300. They have replaced the Pro 300 series with Teleplus HD Pro MC4 DGX. Which I have and use with a 70-300L but haven't tried it on the 180 macro yet.

bobfitz Loc: Kendall-Miami, Florida

When using a 1.4 converter on an already long lens, I hope you are using a tripod. Remember the conversion factors. With Canon, I believe it is 1.6. You must calculate the conversion factor as well as the 1.4 converter to appreciate the true settings of your camera. I have never used an extender but I know they have an overall significance in the exposure.

amfoto1 Loc: San Jose, Calif. USA

MJPerini wrote:

...I would also Call Canon to ask if using the older lens with the newest converter could possibly be a mis-match of some sort. That shouldn't be the case, but perhaps the Converter series II might bee more compatible....

Original poster stated he (or she?) is using BOTH the latest version of EF 100-400mm "II" (2014) and the latest version of EF 1.4X "III" (2010). Those are reasonably contemporary and should be completely compatible with each other.

I responded about using the much older EF 1.4X "II" (2001) on my EF 100-400mm "II" and finding that combo works well, too. If anything, I'd expect the ten year newer 1.4X the OP is using would do even better.

amfoto1 Loc: San Jose, Calif. USA

photodoc16 wrote:

...Does a 1.4X TE on a 180mm macro turn it into a 252mm macro so you can stand further away or does it change the level of magnification by a factor of 1.4? And, by the way, is there a market for Macro lens extenders?...

For all practical purposes, it does both.

Adding the 1.4X teleconverter effectively makes for a 252mm f/5 combo... with the same minimum focus distance {MFD}. Using a "longer focal length" at the same MFD will magnify objects more.

By the way and on the other hand, macro extension tubes do not have any optics so they don't change the lens focal length. Instead they change the MFD, making the lens capable of focusing closer. So they also can make increase magnification beyond the lens' native capabilities.

Personally I wouldn't be very inclined to use a 1.4X on my Canon 180mm Macro lens because it's already a slow focusing lens and would be even slower with the TC added, plus the 180mm Macro doesn't have IS and it would be a real challenge to try to get a steady shot at high magnifications. It's a fine lens and I don't know how it would handle the added optics. Not all lenses "play well" with other optics. Plus I have a 300mm and 100-400mm lenses that are pretty darned close focusing (and can be made more-so simply by adding an extension tube).