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| sigma tc1401 - Page 1 | |
| tele-convertors for sigma | Rate Topic |
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| Posted: Sat Jul 27th, 2019 05:38 |
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1st Post |
blackfox
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as some will know I use the popular sigma 150-600 C lens coupled with a Nikon D7200 crop body its one of the best rigs I have used over the years . this week I spotted a sigma tc-1401 teleconvertor for sale at a bite your hand off price so I went for it . we went for a spin on thurs to Colwyn Bay one to test out our new car and two to try out the t.c . first conclusions are it works well with no MA issues however a much increased shutter speed is needed the simple maths are camera and tc = 840mm plus 1.5 crop factor =1260mm so my 1/1000th shutter speed was to low imho it needs at least 1/2000th sec to work hand held . below a couple of test shots I will persevere with this till I get it right. all shots hand held   
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| Posted: Sat Jul 27th, 2019 09:06 |
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2nd Post |
Eric
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Good luck with that Jeff. I had the 1.4tc with my Sigma 500 prime and although it gave me the extra reach, I found the contrast dropped and the surety of focus wasn't as good as without the TC. With a zoom, you may face the dilemma of ....do you keep the TC in place when you want the 200-400mm region or take it off ( if you have time) because I suspect the bare lens will always be better .
____________________ Eric |
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| Posted: Sat Jul 27th, 2019 17:56 |
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3rd Post |
blackfox
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Early days yet Eric and it looks like only one decent day this coming week ,what a change in the weather
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| Posted: Tue Jul 30th, 2019 11:46 |
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4th Post |
blackfox
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still persevering with the t.c ,I have realised two things auto iso is a no no and a high shutter speed is needed . might try it in shutter priority but heres a couple from this afternoon in heavy overcast after the storm . cant seem to post using the blue cross
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| Posted: Tue Jul 30th, 2019 12:07 |
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5th Post |
jk
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blackfox wrote:still persevering with the t.c ,I have realised two things auto iso is a no no and a high shutter speed is needed . might try it in shutter priority but heres a couple from this afternoon in heavy overcast after the storm . This might be contentious but I have always regarded the P mode as a lazy photographer's way of shooting. Likewise for AutoISO but to a lesser extent as sometimes you need some automated help when working in difficult conditions. I will admit to having used it but when reviewing results afterwards always thought that I could have adjusted better. I think that up till recently that ISO6400 was the max I would push to but with the Z7, D850 and D500 maybe one stop (ISO12800) more is acceptable. I would always try to use one stop down e.g. ISO3200 and shoot in Manual mode with adjustments of aperture or shutter speed, as and when.
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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| Posted: Tue Jul 30th, 2019 16:45 |
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6th Post |
Eric
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Was reading a post on another forum where someone made the blindingly obvious observation...that I had overlooked...relating to the use of TC for wildlife. Using (some cameras) internal crop feature (eg D500/D850 and other FX bodies) means you keep the fstop/shutterspeed/iso advantage that's lost with a TC. Of course that may only be a stop, but that could be significant when exposure parameters are being pushed by lighting and subject movement. The same applies to a post process crop, I assume. Of course there's the question of whether the cropped image, with reduced mp and enlarged noise, is acceptable quality. But the perceived wisdom is that using a TC not only loses exposure latitude but image quality. Until I got the Nikon 1.4 III, I had tried and finally discarded every TC I owned That includes, the Sigma, KenkoPro3000, Nikon earlier versions...and a few Canon versions back in the day. It's not that they weren't good, more that they all created images that needed more post processing to attempt to bring out the detail seen in the bare lens images. In addition the responsiveness of the focusing suffered, albeit only a tad. The Nikon 1.4 III is something different ....image IQ seems to be uncompromised. But the above exposure loss discussion still applies and to some extent there is some loss of focus responsiveness. I've yet to personally evaluate the perceived advantage of in camera cropping as opposed to using the TC, but looking back, I've often preferred a photoshop crop of a bare lens photo over the TC straight image. Similarly, cropping an FX photo compared to a DX photo. The final point on TCs is they are best used on prime lenses. Maybe it was the quality of my zooms (there is inherent variability in zoom lenses) but I always found that a TC seemed to find out the limitations in my zooms...invariably at the long end where it was needed. Just my 2 cents
____________________ Eric |
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| Posted: Wed Jul 31st, 2019 03:49 |
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7th Post |
blackfox
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Wise words there Eric , I have used the same t.c on a previous lens the sigma sport (canon fit) and using it on a 1D3 and 1D4 which are both canons H sensor so near to full frame size . And with good results . This is my first attempt at using it on a aps.c sensor and I'm finding noise is a major issue . I will be checking on MA as well later today . Making some progress with it but in mulling things over my own initial testing is flawed by trying to find targets , at this time of year a lot of wildlife is very wary and basically I'm not getting close enough which then dictates cropping the image. Got a rainy day today to play around and do further testing . Your findings re.tc quality is also useful as I'm considering getting rid of the big sigma and going back to a 300mm F4 which will then need at least a 1.4 tc .having used one before I know they are superb , this all depends on my health recovery as equipment weight is now a issue
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| Posted: Wed Jul 31st, 2019 04:32 |
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8th Post |
blackfox
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the pics from yesterday that wouldn't upload   
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| Posted: Wed Jul 31st, 2019 11:22 |
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9th Post |
blackfox
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After further testing I have decided to return the tc ,the noise issue is to problematic . I will be looking for a 300mm f4 shortly
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| Posted: Wed Jul 31st, 2019 11:38 |
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10th Post |
jk
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blackfox wrote:After further testing I have decided to return the tc ,the noise issue is to problematic . I will be looking for a 300mm f4 shortly Will the 300mm f4 replace your Sigma 150-600?
____________________ Still learning after all these years! https://nikondslr.uk/gallery_view.php?user=2&folderid=none |
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