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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 12:50 pm 
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Some really great pics. :clap:

I have a question regarding my sigma lens 70mm - 300mm. It is the bottom of the range one since i bought it when i was still a student.

During our trip to KNP over easter the lens started to make a sound like gears slipping when switched on and again when switched of. The auto focus didn't work properly after that. So i continued to use it in manual focus mode since the 18-70mm lens will just not do when i want to take a pic of something that is not in or on the car :tongue:

Every time the camera is switched on or off the lens' gears sounded like slipping. We then switched it on in the morning and never switched it of during the day. Has this or something simular happened to any other lenses? Can it be fixed or will a new lens be cheaper than the labour cost involved? Thinking of getting a bigger lens or atleast a teleconverter.

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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 12:53 pm 
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Your Sigma still is belt driven.
It will be cheaper to replace it for a new lens. :thumbs_up:


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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 1:02 pm 
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That is what I thought. Atleast i can still use it in manual focus mode.

And the replacement will have to be an upgrade :hmz:

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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 1:06 pm 
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Upgrade too what?
Something else than Sigma?


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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 1:15 pm 
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A lens with more zoom than 300mm, and i think the A200 Sony also needs to be upgraded. I am OK with it but my wife wants her own camera, she is the one that takes most of the photo's since I usualy drive.

I don't have a problem with Sigma, I'm thinking about getting a new Canon camera housing with a sigma lens to go with it. The 120 - 400 OS HSM lens. seems like a good option. or maybe a 500mm lens. I just started to look around so will have to spend some time reading reviews and making sure I get the best for the budget.

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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 1:23 pm 
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Then, if I was you, would go for the 150 - 500 mm option.
Gives you just that little bit extra reach. :thumbs_up:

The camera is, kind of, irrelevant. :hmz:


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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 1:27 pm 
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Beautiful pictures!!! :thumbs_up: Thanks!

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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 1:33 pm 
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Just saw that for R3600 Sigma sells a 2x Telleconverter. So maybe the 120 - 400 lens with a 2x Telleconverter might not be a bad combination? :huh:

240mm minimum zoom might be a bit unforgiving but i am sure that there is time to attach the converter when somethink is spotted and the extra reach is required? :thumbs_up:

Just a thought

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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 1:37 pm 
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Depends on what F factor the lens has.
If it is a F 4 for example you can forget it.
The lens will not focus and you will loose your auto function.
Furthermore you will also lose a few f stops.


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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 1:54 pm 
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This is exacaly why its important to ask "dumb" questions for uninformed people like me. :wall:

I have to get back to the technical aspects and do some reading... :whistle:

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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 2:56 pm 
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Hi there Dr. Phil

Camera Technology is leaping forward at a pace of exponential level.
This particulary applies to camera bodies.

First try buy the best BODY you can, with the best features. See this as a short term investment - 3 years.

However the problem is, that you also must try get the best Lenses. And they are not cheap.
I believe 60% of a photo quality is aided by the Lens, 10% by Camera, and 30% by person behind the Camera! :cam:
But where you gain with lenses, are they are more a "long term" investment.- Ten Years

But you need a strategy, and if it is back to the drawing board, on a new camera and lens, allow for what is the type of Photography you predominantly do.
If it only going to be wildlife, a good fast 200mm, and good 400mm are going to be the basic essentials.

If you cannot afford that :hmz: , initially, start with a 300mm zoom, and set your goal of at least a good 400mmUSM, within a year, to get further reach when the 300mm will not do, and you have time to change lenses etc.

Great equipment does not make a great picture - timing, skill and luck take their part - but it sure helps :mrgreen:

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KNP: 03 Jan to 12 Jan 14 (Berg n Dal, PKop, Croc Bridge)
KNP 10 May to 17 May 2013 (Malelane, Satara, Skukuza)
KNP 16 July to 26 July 14 (Croc Bridge, Tamboti, L Sabie )


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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Thu May 12, 2011 4:00 pm 
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Hi Fizzpop,

Thank you for the info. I will keep it in mind when i do my research for the new camera. I want to go more into the Mid range SLR's since the A200 i have at the moment is almost 4 years old and now that the lens AF failed on me, I belief its time to move on to greener pastures. :mrgreen:

I have taken some decent pics with the sony and will keep using it in the mean time. I think only being able to use manual focus will help improve my skill level in taking photos and force me to take more time to take good photos. (Practice makes perfect right :cam: )

I have always wanted to have a nice zoom lense. 400 or 500mm.

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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Wed May 25, 2011 3:44 pm 
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Hi Guys

Sorry but I disagree. I think it is mostly with the photographer. I will agree it does help to have fancy equipment but I have seen a lot of people come up short using the latest equipment and I am talking about the top of the range in Canon and Nikon including the lenses. Most of it comes down to how you pp your work and your knowledge in the software available that you can use.

.Here is a couple taken with the above lense on a Canon 20D

Image

Image

Image

Image

Image


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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Wed May 25, 2011 4:17 pm 
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Those are some great photos. :clap:

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 Post subject: Re: Sigma 120-400 OS HSM lens
Unread postPosted: Wed May 25, 2011 4:49 pm 
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Junior Virtual Ranger
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@PRWIN

Nice photos. Well done.

You are correct that a good photographer will make the most out of the equipment available.

Unless you know your equipment intimately and its limitations, there will be very few keepers at the end of the day. I also believe an artistic flair and vision, is a huge advantage to have also, in the final result.

And that is why, I assume you are also taking good photographs too.

I think however, the point of this thread was to try highlight that a good lens is a priority at the end of the day, no matter what camera body is attached, for attempting decent wildlife photography, all things being equal on Camera and the Photographer.

Cheers

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KNP: 03 Jan to 12 Jan 14 (Berg n Dal, PKop, Croc Bridge)
KNP 10 May to 17 May 2013 (Malelane, Satara, Skukuza)
KNP 16 July to 26 July 14 (Croc Bridge, Tamboti, L Sabie )


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