Skip to Content

Teleconverters/extenders

Discuss and share your wildlife photography, filming and equipment
User avatar
leander09
Posts: 39
Joined: Mon Oct 04, 2010 1:05 pm

Advice on converter x 1.4 and x 2

Unread post by leander09 » Tue Oct 05, 2010 2:45 pm

I see a lot of people use them. I want to know how effective are they. I have a Sigma 100mm - 300mm lens and does it effect the quality and focus a lot?
KNP the Home away from home. . .

User avatar
RUMURUTI
Senior Virtual Ranger
Senior Virtual Ranger
Posts: 1689
Joined: Thu Feb 12, 2009 11:54 pm
Location: Milano (Italy) - IT ALL STARTED WITH A FOOTSTEP!
Contact:

Re: Advice on converter x 1.4 and x 2

Unread post by RUMURUTI » Tue Oct 05, 2010 3:02 pm

Hi leander09
Converters are a great invention but have their drawbacks. I use both a x1.7 and a x2 converter and use them both rarely.
One of the main problems is the loss of a couple of f stops, if you are using a lens with a low f stop (f/2.8) your risk is to find it difficult to take pictures with low or scarce light.
I have noticed a slight drop in focus quality and it's one of the main reasons I avoid using them.
"You can leave Africa but Africa never leaves you"
LIFE IS MADE OF GOOD AND BAD THINGS, I TAKE THE GOOD AND YOU CAN KEEP THE BAD!!!
Andy Benaglia

User avatar
fazekma
Posts: 71
Joined: Sun Dec 05, 2004 1:32 pm
Location: Johannesburg

Re: Advice on converter x 1.4 and x 2

Unread post by fazekma » Tue Oct 05, 2010 4:11 pm

Hi leander09

The tele-converters can work if used on the right lenses. Is your lens the Sigma 100-300mm f/4 APO EX IF HSM?

I use the Nikon 1.4X TC on my Nikon 200-400 f4 lens with great results - the 1.7X produced OK results and the 2X results were NOT sharp. The 2X TC works best with the expensive 300mm and 400mm f2.8 lenses.

I would therefore suggest keeping away from the 2X and use the same brand as your lens - it will be sharper than the generic brands. The TCs also work better on prime lenses and not so good with zooms.

tedredrum
Virtual Ranger
Virtual Ranger
Posts: 164
Joined: Wed Jan 20, 2010 6:50 pm
Location: Anaheim, California USA

Re: Advice on converter x 1.4 and x 2

Unread post by tedredrum » Tue Oct 05, 2010 5:56 pm

Hi Leandro9,

I am very much an amateur and not an expert on the topic. However, I must agree with Mario. It all depends on the quality of your lens. I have the Canon 70-200mm 2.8L IS and 300mm 2.8L IS. I have used the Canon 1.4 and 2x converters with both lenses with great results. The 1.4 loses one f stop and the 2x loses 2 f stops so some of it also depends on the setting in which you wish to use the converters.

Hope that helps. Good luck!

Daron
KTP 2015 (1st time)

November 12-14 Twee Rivieren
November 14-16 Mata-Mata
November 16-20 Nossob

November 20-23 TMNP

KNP July 2016:

July 10-12 Mopani (1st stay)
July 12-14 Olifants
July 14 Orpen (1st stay)
July 15-17 Tamboti
July 17-20 Lower Sabie

brix
Posts: 1
Joined: Tue Oct 19, 2010 10:03 pm

Re: Advice on converter x 1.4 and x 2

Unread post by brix » Tue Oct 19, 2010 10:11 pm

Hi,

the Sigma 100-300/f4 works very well with the Sigma 1.4x converter.

Here you find a test of the lens with this converter.

User avatar
UKbadger
Posts: 214
Joined: Wed May 23, 2007 5:06 pm
Location: London UK

Re: Advice on converter x 1.4 and x 2

Unread post by UKbadger » Mon Oct 25, 2010 11:16 am

Just another possible complication if you are using canon mount.

There are new model x1.4 and x2 converters coming soon and “nobody knows yet if they will make a difference to the sharpness etc. over the old ones, especially when used with lenses like your Sigma.

Thy will be very expensive at first, but will come down over time!

Sadly, the chances are that almost any “big” prime lens will be better than your Sigma with any converter.

User avatar
vinkie
Distinguished Virtual Ranger
Distinguished Virtual Ranger
Posts: 16543
Joined: Tue Jun 07, 2011 7:07 pm
Location: Living in The Netherlands but raised in South Africa

Use a Converter or not?

Unread post by vinkie » Thu Jun 09, 2011 10:35 pm

Hi everybody,

We are going to Kruger in July 2011 and I have read a lot about converters.
I have never used one before and would like to have some advice about this issue before we leave.

Should I buy a converter for my kit(Nikon D7000 with Nikkor AF-S DX 18-105/3.5-5.6G VR and
Nikkor AF-S VR 70-300/4.5-5.6G IF-ED Zoom)? :hmz:

I heard that the range of the zoom is normally 105-450mm with a Nikon DX D-SLR

Would this mess up the pictures or would it extend my range to 600mm using my zoom :mrgreen:


Thanks for the advice

Greetings,

Gert-Jan
Live life on the edge but be careful not to fall off! :wink:


Our 2013 Trip Report: Vinkie and Apex Predator back in the bushveld

:dance: Planning our 2017 trip to Kruger National Park or Kgalagadi Transfrontier Park :dance:

User avatar
DuQues
Honorary Virtual Ranger
Honorary Virtual Ranger
Posts: 14520
Joined: Fri Jan 14, 2005 5:42 pm
Location: Red sand, why do I keep thinking of red sand?

Re: Use a Converter or not?

Unread post by DuQues » Thu Jun 09, 2011 10:46 pm

Gert-Jan, you can use it, but!
The 70-300, which is the only lens you should use it on, will become a f/8 lens with the converter on. Not a problem, except for autofocus. Your camera will not AF with f/8 lenses, so it's manual focus only.

It does mess up pictures a bit, as in that faults in the lens will be enhanced. I'm not using Nikon, so have no idea of the quality of that 70-300. Simple guideline, if it cost less than 1000 euro you might indeed see less quality.

Borrow or hire one, and go birding in Holland. I know quite a few good spots! That will show you what the quality and the handling will be like. Just don't go for herons, they stand still mostly. Try for Gaaien, rietzangers and such. That will be much like photography in Kruger.
Not posting much here anymore, but the photo's you can follow here There is plenty there.

Feel free to use any of these additional letters to correct the spelling of words found in the above post: a-e-t-n-d-i-o-s-m-l-u-y-h-c

User avatar
vinkie
Distinguished Virtual Ranger
Distinguished Virtual Ranger
Posts: 16543
Joined: Tue Jun 07, 2011 7:07 pm
Location: Living in The Netherlands but raised in South Africa

Re: Use a Converter or not?

Unread post by vinkie » Thu Jun 09, 2011 11:02 pm

@DuQues: Thanks for the tip....I don't know if it's possible to hire a converter in Holland?

Don't want to spend too much money on a converter but an Converter Kit for the Nikon costs 200,- euro by Kenko....better to buy a good Flashlight for this money I think :mrgreen:

The 70-300mm lens is a good Super-zoom lens of course a xx-500mm would be nicer but you must have the budget and the time to visit places like Kruger more often :lol: unfortunately we don’t have that opportunity :(

Which spots do you recommend for birding?
Live life on the edge but be careful not to fall off! :wink:


Our 2013 Trip Report: Vinkie and Apex Predator back in the bushveld

:dance: Planning our 2017 trip to Kruger National Park or Kgalagadi Transfrontier Park :dance:

User avatar
DuQues
Honorary Virtual Ranger
Honorary Virtual Ranger
Posts: 14520
Joined: Fri Jan 14, 2005 5:42 pm
Location: Red sand, why do I keep thinking of red sand?

Re: Use a Converter or not?

Unread post by DuQues » Fri Jun 10, 2011 7:54 am

PM sent.
Not posting much here anymore, but the photo's you can follow here There is plenty there.

Feel free to use any of these additional letters to correct the spelling of words found in the above post: a-e-t-n-d-i-o-s-m-l-u-y-h-c

User avatar
harrys
Junior Virtual Ranger
Junior Virtual Ranger
Posts: 4046
Joined: Tue Jul 24, 2007 11:22 am
Location: Boksburg

Canon 2x extender

Unread post by harrys » Thu Jul 26, 2012 5:31 pm

Can anyone please tel me what a 2x extender lense do :hmz: , reason why I ask, a friend of my FIL told him that when you use a 2x extender lense on his 300 mm lense it will be like a 600mm lense :hmz:
Say NO to hotels in KNP!!!

KNP

Skukuza: 28 April to 2 May 2016

User avatar
saraf
Distinguished Virtual Ranger
Distinguished Virtual Ranger
Posts: 7361
Joined: Sun Jan 16, 2005 3:19 pm
Location: Portsmouth, England

Re: Canon 2x extender

Unread post by saraf » Thu Jul 26, 2012 5:45 pm

That is exactly what it does.

But. You can only use them on certain lenses, usually only L series but not all of them. And you will loose two F-Stops, making the lens a lot "slower" e.g. on a 2.8 rated lens you would loose 2.8 and 4 so the best F-Stop you would get would be 5.6.
Want to say Thank You or Well Done to a fellow 'mite? Why not nominate them for a Kudu?

User avatar
DuQues
Honorary Virtual Ranger
Honorary Virtual Ranger
Posts: 14520
Joined: Fri Jan 14, 2005 5:42 pm
Location: Red sand, why do I keep thinking of red sand?

Re: Canon 2x extender

Unread post by DuQues » Thu Jul 26, 2012 5:56 pm

Correct, but there are downsides to it;
- it shows all the faults of the lens.
- autofocus will be slower, or be switched off entirely
- switching it in and out can let dust onto your sensor

Have a look at this page. It is a good appraisal.
On my 100-400 I do use the 1.4, but I do not have AF then, as my 7D will not use AF above f/5.6.

But if you have a good lens (L-series) and you really need the longer lens it is a great tool.
Not posting much here anymore, but the photo's you can follow here There is plenty there.

Feel free to use any of these additional letters to correct the spelling of words found in the above post: a-e-t-n-d-i-o-s-m-l-u-y-h-c

Geckophobe
Posts: 12
Joined: Mon Jun 11, 2012 9:33 am
Location: Pretoria

Which teleconverter to use with Canon 550D?

Unread post by Geckophobe » Fri Oct 05, 2012 8:20 am

I am in the process of buying a better camera (in stead of a good "mik en druk" ) for the first time, and I have decoded on the Canon 550D, the best deal I could find in my budget- and I have seen a number of good reviews also on this forum.

I am looking for a teleconverter to use with the canon 55-250 lens? Which would you recommend?
Satara : 8,9 July 2013
Lower-Sabie : 10,11,12,13, July 2013

User avatar
DuQues
Honorary Virtual Ranger
Honorary Virtual Ranger
Posts: 14520
Joined: Fri Jan 14, 2005 5:42 pm
Location: Red sand, why do I keep thinking of red sand?

Re: Which teleconverter to use with Canon 550D?

Unread post by DuQues » Fri Oct 05, 2012 9:12 am

To be honest I would recommend none.

Your camera will use autofocus up to f/5.6. The teleconverter will take 1 (1.4x) or 2 (2x) stops of light which means that in combination with your f/4-5.6 lens you will have to use manual focus all the way.

If you decide to buy one anyway I would go for the Canon 1.4, that one does not degrade the image quality. With the 2.0 version you will see the IQ going down.
Not posting much here anymore, but the photo's you can follow here There is plenty there.

Feel free to use any of these additional letters to correct the spelling of words found in the above post: a-e-t-n-d-i-o-s-m-l-u-y-h-c


Return to “Wildlife Photography Enthusiasts”

Who is online

Users browsing this forum: No registered users and 0 guests


Webcam Highlights

Addo
Submitted by Spook50 at 15:09:10
orpen
Submitted by Michele Dutrannois at 16:40:20
satara
Submitted by vecopoer67 at 21:51:06
nossob
Submitted by Michele Dutrannois at 16:56:26