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07-20-2012, 02:52 PM   #1
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645D Wide angle lens Quesition

Hello Guys

I am New member my name is Saleh AlRashaid i am from Kuwait from Middle East (GCC) and love photography from long time become more series during 2006 ..... love shooting landscape and cityscape just sold all my canon gears and would like to enter medium format world

planning of getting Pentax 645D with 55mm the new one and need a lens Ultra wide angle for mostly shots and i found the new 25mm which is does not takes filters( Large Hood) can u guys explain about the lens or which adaptor and which lens u recommend ?

07-20-2012, 03:21 PM   #2
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The new 25mm uses internal filters. At least one member made a filter holder for the front. The next wide lens would be the FA 35mm or A 35mm. I have the A version and like it although it is prone to flare.

Welcome.
07-20-2012, 03:42 PM   #3
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QuoteOriginally posted by Yamanobori Quote
The new 25mm uses internal filters. At least one member made a filter holder for the front. The next wide lens would be the FA 35mm or A 35mm. I have the A version and like it although it is prone to flare.

Welcome.
Thats great and how to knew the 645D lens ?! Is FA or DA ?
Can u told me the best store in US i found only the 55mm and i think it would be 30mm on full frame ?
07-20-2012, 06:03 PM   #4
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QuoteOriginally posted by Saleh Quote
Thats great and how to knew the 645D lens ?! Is FA or DA ?
Can u told me the best store in US i found only the 55mm and i think it would be 30mm on full frame ?
Saleh,

The only new lenses made for the 645D currently are the 55mm and 25mm (DA or D FA, the differences between the lenses have been discussed on the this forum) A 90mm and perhaps a wide angle zoom are also in the works, but I wouldn't hold my breath waiting for them.

The 35mm A (manual focus) is a great lens. I love using mine. It's about a 28mm on a full frame 35mm. It can be purchased used for around $700-800 if you take your time shopping online. I shoot landscapes and have never found the need for autofocus on the 35mm as it's easy to focus and I often end up shooting at infinity anyways.

The new 25mm is the same as 19.5mm, so quite wide (and quite expensive at $5000 new in USD).

The 45-85mm FA (auto focus) is about the same cost as the 35mm A used and is a sharp and pretty fast focusing for medium format. It covers a good semi-wide to normal range.

Hope this helps

07-21-2012, 12:42 AM   #5
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QuoteOriginally posted by Ryan Tischer Quote
Saleh,

The only new lenses made for the 645D currently are the 55mm and 25mm (DA or D FA, the differences between the lenses have been discussed on the this forum) A 90mm and perhaps a wide angle zoom are also in the works, but I wouldn't hold my breath waiting for them.

The 35mm A (manual focus) is a great lens. I love using mine. It's about a 28mm on a full frame 35mm. It can be purchased used for around $700-800 if you take your time shopping online. I shoot landscapes and have never found the need for autofocus on the 35mm as it's easy to focus and I often end up shooting at infinity anyways.

The new 25mm is the same as 19.5mm, so quite wide (and quite expensive at $5000 new in USD).

The 45-85mm FA (auto focus) is about the same cost as the 35mm A used and is a sharp and pretty fast focusing for medium format. It covers a good semi-wide to normal range.

Hope this helps
Thank you @Ryan Tischer so i should skip 55mm and get 45-85 instead ? so all the lens i can use lee filter with it only 25mm which is came with a hood. i found when i get a kit 645D i can save $300 for the 55mm.

i would get 35mm for general landscape shooting... thanks Ryan
07-21-2012, 04:57 AM   #6
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If you need information about the lenses, check the lens database here.
I own both the 35mm A and the 55mm D-FA for the 645D. Both are great lenses. The bokeh of the 55mm is really good for portraits. Also it has f/2.8 and is very sharp wide open. If you need a good walkaround lens this lens will be your choice. If you do mainly landscape photography, the 35mm is your lens. I usually stitch 4-6 shots together and don't miss a wider focal length at all. The 25mm seems to be also very good, but so far the price is holding me back from buying one.
If you need a little bit more wide angle I would choose the 35mm. The 45-85mm is pretty big compared to those two lenses, but is also very good in the 35-50mm range.
07-21-2012, 05:01 AM   #7
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QuoteOriginally posted by derAngler Quote
If you need information about the lenses, check the lens database here.
I own both the 35mm A and the 55mm D-FA for the 645D. Both are great lenses. The bokeh of the 55mm is really good for portraits. Also it has f/2.8 and is very sharp wide open. If you need a good walkaround lens this lens will be your choice. If you do mainly landscape photography, the 35mm is your lens. I usually stitch 4-6 shots together and don't miss a wider focal length at all. The 25mm seems to be also very good, but so far the price is holding me back from buying one.
If you need a little bit more wide angle I would choose the 35mm. The 45-85mm is pretty big compared to those two lenses, but is also very good in the 35-50mm range.
thats great i found 45-85 used in ebay $769...

the 35 it can takes filter right ?
07-21-2012, 05:05 AM - 1 Like   #8
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Yes. It has 77mm screw mount. I use it with the Lee Filter Adapter.
You can also buy lenses at KEH.com. Check out their medium format section for used 645 lenses. Sometimes also Adorama or B&Hphotovideo have some, but not that many.

07-21-2012, 05:43 AM   #9
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QuoteOriginally posted by derAngler Quote
Yes. It has 77mm screw mount. I use it with the Lee Filter Adapter.
You can also buy lenses at KEH.com. Check out their medium format section for used 645 lenses. Sometimes also Adorama or B&Hphotovideo have some, but not that many.
how about this one SMC Pentax-FA 645 35mm F3.5 AL [IF] ?
07-21-2012, 09:25 AM   #10
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Saleh,

The 45-85 is a good lens and maybe you can go without the 55mm, or at least see how the zoom works for you first. You can get a filter on the 25mm, but you have to make your own filter holder. I'd start with the 35mm and see if its wide enough for you.

The FA is autofocus and a slightly different lens formula altogether. Some like the FA more, but most seem to prefer the A (manual focus) on the 645D. It's easy to focus. The main difference for me is that the A manual focus only goes down to f/22 and the Auto focus FA goes to f/32, I believe. I've had to focus bracket with the 35mm A in certain cases.
07-21-2012, 09:28 AM   #11
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Thanks Ryan for the great information....
aim going to start with 35mm manual focus
07-21-2012, 04:40 PM   #12
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QuoteOriginally posted by Saleh Quote
Thats great and how to knew the 645D lens ?! Is FA or DA ?
Can u told me the best store in US i found only the 55mm and i think it would be 30mm on full frame ?
Both the D FA and FA 25mm takes internal filters. The 55mm would be equivalent to 43mm on a 35mm camera.

I bought my 645D from Japan. I believe B&H carries the 645D.
07-21-2012, 07:23 PM   #13
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Saleth, Here are a few samples from the 25mm that I have. I still intend to add more but I got really busy at work so it will have to wait another week or so. I like this lens but it's definitely an every day shooting lens unless a lot of your work lends itself to this focal length. pentax 645D 25mm samples
07-21-2012, 10:52 PM   #14
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Larkis

really sharp sharp !! but the problem it doesn't take filters (LEE) .... i believe lee should special holder it ...
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