Posts tonen met het label vivitar. Alle posts tonen
Posts tonen met het label vivitar. Alle posts tonen

zondag 4 maart 2012

vivitar 200mm f/3.5





Vivitar was a lens re-seller, and the serial numbers are an indicator who actually manufactured the lens. There is some difference in optical quality and exterior per manufacturer. You can check who made your lens on this list
The serial number on my lens starts with 28 which means it’s made by Komine.

I am not sure if I am really positive about this lens. In test shots it shows what it can do, but in the field (which is way more important) it is a lens which takes getting used to before you get good results. It is pretty difficult to get the right focus, and if you missed just a bit you will notice it. I guess I will be more positive about it in the future, but for now I really need to pay attention to my focus, more than on any other lens (except for macro photos)

Handling the lens
The lens feels solid, it is quite heavy but not front heavy. You can stabilize it quite easily and does not feel unbalanced on my D60. The focus ring is quite smooth, not as smooth as my Nikkor lenses, this one uses oil. This is a major disadvantage during cold days because the oil becomes stiff and the lens is harder to focus. However most of the off-brand lenses use oil in their focus mechanisms so I won’t nag about it anymore. The thing is, focus is really critical with this lens. When I first got it and tested it I was a bit carless about my focussing. At first I thought I bought a dog because images were soft. This lens does not tolerate focus errors at all, and the right focus is a bit hard to achieve. It takes a smaller twist on the focus ring than I used to to defocus the lens. This is could be because the focus ring is not precise enough, but I think it’s mostly because it is a longer lens with a faster aperture than I normally use. The lens has a built in hood. It is relatively short and I am not sure how effective it really is. But it probably is better than nothing and it seems like a nice feature. (especially during the rain to keep your front element dry)



Results
Wide open this lens is extremely prone to CA. In high contrast situations you’re able to see it without looking closely. During processing you will find CA everywhere. However it falls within the limits of what’s correctable in my post processing program ( I use Capture NX 2, but I’m sure any other program will be able to cope with it as well)
The sharpness wide open is a small OK. It does not shine wide open. At f/3.5 details start to blur, perhaps also caused by the CA.

without correction

With correction


At f/5.6 the quality starts to increase rapidly. Sharpness increases to great, but CA is still visible, but a lot less. You won’t be able to see it at normal magnifications, only when you zoom in for small precise adjustments (hey not pixel peeping right?) I would be confident to use this lens for a large print for a paid job at f/5.6.

F/3.5

F/5.6


Bokeh is all right, with busy backgrounds it can be distracting, especially branches. The only solution is to open up your lens, or come closer. But a lot of lenses won’t be able to handle it very well. If the background is a bit smoother the bokeh will be all right.



Conclusions
I bought this lens mostly because I wanted something faster than my 70-210 f/4-5.6 for my walk around wildlife photographs. And this lens does the job all right, it is a good lens but nothing special. It is not as sharp wide open as my 70-210, but this one has a faster aperture. I end up using this lens as a regular 200mm f/5.6 lens with some emergency extra F-stops. The reason I do so is because focus is really critical and I just need the DoF to get sharp images. Especially for wild life because the focus ring has more friction than my Nikkor lenses (but as much friction as my other 3rd party lenses) which makes it a bit less precise. And because the real sharpness of the lens is just better at f/5.6 So in conclusion I do recommend this lens, but don’t pay too much for it. The lens is OK, but nothing more. 

Note:
If you want full resolution images, just sent me an email, and I will send them to you. I just don't like to put up full resolution images


donderdag 3 november 2011

Vivitar Series 1 28-90mm f/2.8-3.5 review




WARNING: Vivitars, and especially this lens, are notorious for problems with the aperture. This lens is notorious for oil leaking on the blades.

My lens is one of those lenses with oil leaking on the blades, this causes the blades to be too slow to close down. Fortunately because of something in the design the lens doesn’t automatically open up all the way when you put it on your camera with the aperture closed. It opens up to f/4, giving me two apertures to work with. (I think this is caused by the higher friction, so the springs which should open it up all the way are too weak).

Before you plan to buy this lens, check the serial number. There are multiple versions around, made by different manufacturers, although I have heard that every version of this lens is good. My lens is made by Komine.

Handling the lens:
The lens is pretty heavy, yet it does not feel unbalanced with my d60, and of course this weight should be expected for a large aperture zoom lens. The lens has a different design than most lenses: you have to refocus every time you zoom. This takes some time to get used to, but in the end you’ll keep it in mind.
The design allows very close focus at the widest end, but only a minimal focus distance of one meter at 90mm. To be honest I really like this, it gives a nice wide angle look to your near-macro shots, something you don’t see very often.



Handling the lens without metering:
If you use this lens on a consumer grade Nikon camera you’ll probably lose metering.  but if you get the hang of guessing the exposure this lens will not pose any problems. Yes this lens has a variable aperture, but it’s only half a stop, so if you forget to adjust you can easily fix it in post. And because you have to refocus anyway after you’ve zoomed this lens in or out you’ll probably remember adjusting the exposure just a bit.

Results:
The lens shows quite some chromatic aberration wide open, especially wide open. Yet your post production program is very well able to remove this. When you close it down, there still is some CA but you have to look for it. However I like to get rid of it anyway since it takes almost no effort.

Sharpness is almost OK wide open. You get a usable image, but if you look your photo at 100% you see that is soft compared to a prime shot wide open. I’m not sure if this is a fair comparison, a prime has an easier construction, but why would you settle for less if you also have a prime? However if you close it down one stop it sharpens up to very usable levels, but don’t expect extreme sharpness.

Bokeh is ok, nothing really special, but also not very distracting.



There are some downsides though, this lens is pretty prone to flare. Sometimes the flare is all over your photograph, reducing the contrast. You can use this to your advantage, but sometimes it just happens too often and easy.
I have heard quite some complaints about vignetting, but because I use this lens on a DX sensor I have not yet noticed it. When I shoot it against a white wall I’ll probably see it, but until now I have not seen it in “real” photographs.
(the highlights in the background is flare caused by a flash positioned at 60 degrees from camera left)


Conclusion:
Buy this lens if you want an easy lens with a lot of possibilities, and that’s the reason I like it. You get a useful range, you can focus really close and you have a fast lens. This sounds too good to be true, and of course it is. The results are ok, but not amazing. I think that’s the reason I don’t use it very often, because I also have a 28mm and 50mm which do have amazing image quality and are my preferred focal lengths.  

dinsdag 11 januari 2011

vivitar 300mm f/5.6 (made by Tokina)





I posted a photo (sorry for the background etc. didn't had time to take a good one) of this lens here because there are different versions of this lens. First of all Vivitar isn’t a manufacturer it’s a reseller. It sells lenses made by others like Komine, Tokina and Kiron. You can identify the manufacturer by the serial number. Just look at the first two digits of your serial number and check it on this list 
The serial number on my lens is 37609225, meaning it’s made by Tokina. But Tokina has made two 300mm f/5.6 lenses, with different optical constructions and quality. Reviews of these lenses are scarce on the internet, and I found one of the version I have and one of the other version. One was enthusiastic about the lens, while the other about the other version wasn’t. I decided to buy the lens anyway because I could always resell it for around the same price, but I probably never will I really come to like this lens.

The lens feels good, it has a nice large part what you can use to focus, and the focus is a bit stiff. It is not as smooth as the Nikkor lenses. I suspect that there is oil in the lens to make everything glide over each other. The most important part of this is: it doesn’t really matter, you are still fast enough to focus on living things.
The lens has a lens hood and it’s relatively light. Unfortunately it is quite large, it will not fit in my lowepro slingshot 200 (mounted on my camera). It is just a bit too large, something to take into consideration before buying this lens.

Results: first of all I haven’t tested this lens at any aperture slower than f/8. It simply makes no sense to do that because you want a fast shutter speed. (at least if you use this lens for wildlife photography). At f/5.6 the lens seems sharp, while you may see some chromatic aberration.


Even zoomed out you’re able to see it. As far as you have a quality in chromatic aberration this lens has quite good quality. It is not a very dark purple cast, but kind of lighter pink. But of course chromatic aberration is a bad thing, so if you plan to shoot a lot of photographs with large contrasts against the sun you might want to pick another lens. At f/8 the aberration disappears for quite a bit but if you zoom in it is still noticeable. (meaning it’s easy to correct)
When you photograph with the sun on your side, or in your back you will not see it, maybe in contrasty areas when you zoom in on 100% but that is easy to correct. For example: I took this photograph with the sun in my side. 


Sharpness: the lens is sharp, even wide open. I never felt the urge to close this lens to get a better sharpness. I have been able to make quite some aggressive crops in less than perfect lighting conditions. That’s the reason I love this lens so much, it almost doesn’t matter at what aperture you’re at because it is sharp anyway. (of course the DoF will differ but that’s another story).



Bokeh: first of all, this lens will not produce a lot of bokeh when you’re shooting wildlife. With a maximum aperture of f/5.6 you will not be able to get creamy portrait-like bokeh. But when you’re pretty close to your subject and you open up to f/5.6 you will discover a non distracting bokeh. 


It is nice and creamy but nothing special, however you have to watch out, as I already said you will get quite a large DoF even though it’s a telephoto lens due to the small aperture. This can create a distracting bokeh. 


Conclusion: it is a wonderful lens, but you have to pay attention since there are several versions with different quality. It will give you access to the telephoto range and I have took many wildlife photographs with it that I really like. But sometimes you’re not able to isolate the subject due to the small maximum aperture. If you want a larger aperture you also have to pay more and carry more glass. All I can tell you that I really like this lens, it’s sharp and it handles very well.

Some other notes:

  • It’s minimum focus distance is pretty far away: a little less than 6 meters. I have never been that close to a wild animal but when you plan to use this lens to photograph your pets, you might want to pick another lens since you will be taking those photographs from the other side of the garden.
  • Check the diaphragm, my experiences with the diaphragms of Vivitar aren’t as good as with any other brand. Check if the blades are oily or if they don’t close as fast as they should due to old springs.
  • Mine came with an annoying lens cap, I have to screw the cap on the lens using the filter thread. Luckily I had a spare normal lens cap.
  • The lens doesn't come with tripod-collar. I made a DIY collar because you will need a tripod to stabilize the lens.