Author Topic: 2x converter with 300mm f2.8  (Read 5009 times)

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Offline gazraa

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2x converter with 300mm f2.8
« on: November 14, 2010, 05:34:15 PM »
I have the minolta 300mm f2.8 apo g with a 1.4x converter as my main wildlife lens, but I need more reach. Is a 2x converter a better way to go or should I save my pennies for a bigger lens? I can't afford the big 600mm, I wish I could though, so it would more likely be a third party long zoom if I were to get the lens instead.

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Offline Rob aka [minolta mad]

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Re: 2x converter with 300mm f2.8
« Reply #1 on: November 14, 2010, 05:49:40 PM »
Your only real options above 450mm (with 1.4 TC) are the 500 mirror, Sigma 170-500, the Tamron 200-500, the 70-400G and the minolta 400/4.5  as far as i am aware. Having used the sigma 170-500 and the 500 mirror, thay arent really an option as i would suspect is the Tamron, so the only real option is the 400/4.5.
I have read mixed reviews about using 2 x TC's and have always noticed a slight reduction in IQ with the 1.4 so a 2x TC would be worse.
My own personal opinion would be to get the 400/4.5

Here is a test of the 300/2.8 http://artaphot.ch/index.php?option=com_content&task=view&id=174&Itemid=43


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Offline rannari

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Re: 2x converter with 300mm f2.8
« Reply #2 on: November 14, 2010, 06:15:34 PM »
I'll agree with Rob. Just to add that for wildlife I find that it is always great to have as fast lens as possible. Some animals just don't understand that they should move at daytime when there is enough light ;-)

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Offline tpe

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Re: 2x converter with 300mm f2.8
« Reply #3 on: November 14, 2010, 06:19:43 PM »
I am inclined to agree, i had an old first gen minolta 2x converter and noticed that my image quality using it was not visibly better than upsizing in photoshop and got rid of it almost the very next day. I can try and post some 300/4 plus 1.4x tc against a 500/8 if it helps but dont think it will be as good as the 300/2.8? Another think i have noticed is that many say that the TCs dont affect AF much, but in my experience this is just wishfull thinking.

Tim

On a totally different note i have been out with a mate who is very well known locally for his bird shots and he does use a 500/5.6 (big canon lens) but only for in flight, otherwise it is a case of feed and portable hide. The point being a long tele is nevergoing to be as good as bringing th esubject to you?!.

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« Last Edit: November 14, 2010, 06:22:58 PM by tpe »

Offline gazraa

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Re: 2x converter with 300mm f2.8
« Reply #4 on: November 14, 2010, 07:56:58 PM »
I agree, getting the subject closer will sort out my issues, but lately I've been to a few places where I just can't get close enough, but with a longer lens I might have been able to get the shot I wanted.

I'll take a look at the 400mm though
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Offline Rob aka [minolta mad]

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Re: 2x converter with 300mm f2.8
« Reply #5 on: November 14, 2010, 08:05:39 PM »
From what i have seen, the prices are roughly about the same (ian hobday and matuayastore)
So it shouldnt cost you anything to change from the 300 to the 400.
Just finding them is the difficult bit.


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Offline tpe

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Re: 2x converter with 300mm f2.8
« Reply #6 on: November 19, 2010, 11:57:43 AM »
400mm minolta on ebay http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=190468604193&ssPageName=STRK:MEWAX:IT but buyer only has 31 as feedback but mainly sony minolta camera stuff.

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Offline gazraa

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Re: 2x converter with 300mm f2.8
« Reply #7 on: November 19, 2010, 01:10:57 PM »
stop tempting me!! :)
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Offline david-stallard

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Re: 2x converter with 300mm f2.8
« Reply #8 on: November 19, 2010, 01:35:07 PM »
Dominic (used to be on here) is selling his mint 400 with hard case, think he said he would take £1600 for it, looking at the link above I believe that's him - it's a serious piece of kit for that money

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Offline gazraa

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Re: 2x converter with 300mm f2.8
« Reply #9 on: November 19, 2010, 06:19:43 PM »
If only I had that sort of cash. Ah well, I can always hope for that lottery win.
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Offline Gordon McGeachie

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Re: 2x converter with 300mm f2.8
« Reply #10 on: November 19, 2010, 09:35:00 PM »
If only I had that sort of cash. Ah well, I can always hope for that lottery win.


you and me both............................
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Offline balacau

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Re: 2x converter with 300mm f2.8
« Reply #11 on: November 19, 2010, 10:08:18 PM »
Yeah I 3rd that on the lottery win idea...

That Minolta 400mm F4.5 sure is a monster.  A quick conversion reveals its just as heavy as the original 50-500mm "Bigma".  A real serious amount of weight.  I can appreciate its like comparing apples to oranges though.

There's a Tamron 180mm macro on there up for grabs as well.

I'll put that 400 4.5 on watch just to see how much it goes for; for curiousity sake if nothing else.  In mint condition, I'd expect some interest at least.

Getting back to the topic though, if we're looking at wildlife pictures, how about the Sigma 500mm F4.5 APO EX DG?  But at £4800 on their UK site, ouch that lens has a sting in its tail!  There's also the new version of the 50-500mm "Bigma", at £1400.  But will it be fast enough for the task in mind I wonder?  I'd imagine 95mm filters to be expensive as well; even for a basic UV protector.

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Offline Gordon McGeachie

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Re: 2x converter with 300mm f2.8
« Reply #12 on: November 19, 2010, 10:53:08 PM »
at the moment, I will stick with my 20 year old sigma 400mm f5.6 non apo/macro...


oh to be able to have  minolta white lens, the 600 would be nice............
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Offline pope

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Re: 2x converter with 300mm f2.8
« Reply #13 on: November 20, 2010, 01:17:08 AM »
No. Save your pennies.
I have a tamron b-bar 2x that i have used with a 80-200 hs apo. The af is slow and hunts, the images are ok if you don't crop, but i get a way better quality image if i crop the 80-200 to the same size or bigger, + fast af, + narrower dof.

By the way, how is the image quality of the 300 2.8 with the 1.4x compared to without 1.4x? Is there any slow down of af speed/accuracy, and can you crop the 300 +1.4x much? cheers.
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Offline gazraa

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Re: 2x converter with 300mm f2.8
« Reply #14 on: November 20, 2010, 09:52:19 AM »
I've been impressed with the 300 + 1.4x converter. It is quicker to focus without the converter on it, and I do get a bit of hunting, but that might be down to technique a bit too.

Cropping, I've had A3 sized prints done from a cropped image where I cropped it down to about a quarter of the original image size. Looked good enough to me, but then I don't do much printing. Most of my Chester Zoo shots on my Flickr account are cropped shots from the 300 + 1.4 converter.
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