SMCP FA 50/1.7 pentax

[tiong78]

any1 got this lens?
how do u find the lens?
cos took a few pics this weekend and found the internal reflections quite a prob... wondering if its juz my lens or a generic prob for this lens. This only happens when im taking subjects against strong backlight..
cos my smc tak 50/1.4 dun seem to have this prob.

if its a isolated case, i can still change it at CP.

[Top Gun]

I do have the lens, I am very satified with it. The performance is similiar to FA50/1.4. But I never shoot photos with it towards strong light.
Are you using the lens with DSLR? It maybe the source.

[tiong78]

mm..
maybe its the strong light or maybe its the filter... mounted a skylight heliopan on it.but a B+W UV on the tak.probly have a test later at hm n see if its the prob.

so u got ur adaptor?

[fengwei]

Originally Posted by tiong78 mm.. maybe its the strong light or maybe its the filter... mounted a skylight heliopan on it.but a B+W UV on the tak.probly have a test later at hm n see if its the prob. so u got ur adaptor?

I don't think you need a filter on the 50mm f1.7 lens, right? 'Cause the front glass is quite inside the body, not so easy to get scratched. A UV filter's main purpose for DSLR is to protect the lens. But no matter how good the filter is, it's still a piece of glass cutting in the light. Sometimes a filter will increase or cause flare based on what I've read.

I don't use a filter on the Pentax 50mm f1.7, not on the 100mm macro either, 'cause both have built-in lens hood.

Cheers!

[tiong78]

ya.
i believe its the filter.
will still mount a metal hood on top of it for protection.
better safe than sorry.

[Spyer2]

Any sample photo to show the 'internal reflection' you mentioned?

[choen]

In my experience Pentax lenses very seldom ghosts and hardly suffers from internal reflection. The same cannot be said for most of its competitors.

It could just be whatever filter you have put on. If not, then your lens must be dirty. Give it a good dusting and wipe.

[tiong78]

confirm its the filter.
tested it w the B+W UV tat was on the tak this morn.no such prob anymore when taking against backlight.

will post a pic w the internal reflection tonight.

[Top Gun]

Maybe the aperture blades and CCD sensor cause the ghost.

[tiong78]

here is the image...
http://gallery.clubsnap.com/showphoto.php/photo/6433

[Francis Lee]

Originally Posted by tiong78 confirm its the filter. tested it w the B+W UV tat was on the tak this morn.no such prob anymore when taking against backlight. will post a pic w the internal reflection tonight.

Hi, have seen the picture and certainly the fault lies within the filter. I have a similar problem when I did a lens test with a cheapo plastic filter that comes with the lens.
Also do aware that placing filters (cokin type) too much a distance from lens front element create a double image problem, especially with digital cameras.

[fengwei]

Originally Posted by Francis Lee Hi, have seen the picture and certainly the fault lies within the filter. I have a similar problem when I did a lens test with a cheapo plastic filter that comes with the lens. Also do aware that placing filters (cokin type) too much a distance from lens front element create a double image problem, especially with digital cameras.

That's why I'm not putting any filter infront of my 50mm F1.7 lens It's a cheap lens anyway, no point to buy an expensive B+W filter for it I guess. No matter how good the filter is, it's still a piece of glass blocking the light

But I do put B+W UV MRC filter on my 16-45DA lens though.

[tiong78]

how much did the B+W filter cost? and the polarizer?67mm right?
thinking of getting it once CP got the stock for the 16-45.

[Top Gun]

HOYA(O) UV is already good enough for those consumer lens. A 49mm will not be expensive.

Originally Posted by tiong78 how much did the B+W filter cost? and the polarizer?67mm right? thinking of getting it once CP got the stock for the 16-45.

[tiong78]

but i like taking pics w backlight though. if other filters produced such internal reflections n flare, will be better to invest in a better filter for protection.

[fengwei]

Originally Posted by tiong78 but i like taking pics w backlight though. if other filters produced such internal reflections n flare, will be better to invest in a better filter for protection.

Or better yet, no filter at all

Especially for this cheap 50mm f1.7 lens. I feel the front glass is not very easy getting scratched.

How much is a brand new 50mm f1.7 lens anyway? I got it second hand with the D camera, so don't know how much it costs.

Cheers!

[tiong78]

its 268 after GST at CP. actually only 70-80 less than a 1.4. juz that both have been discontinued and CP only have the 1.7.

[choen]

I've been using the FA 50 1.4 for years now. Certainly prefer it over the Nikon one. Always loved the fact that Pentax aperture rings provide the half stops.

Never used 'protective' filters over it, and with the usual dust and wipe the front element will look as pristine as new. If you ask me I'd say that such filters are not neccessary, since I would never be going into sandstorms, where glass coatings and everytihng else get eroded off.

[xdivider]

Originally Posted by tiong78 its 268 after GST at CP. actually only 70-80 less than a 1.4. juz that both have been discontinued and CP only have the 1.7.

Picked up a 50mm f/1.4 at AP for 338. Think its the last one there.....

[tiong78]

Then u probly got the last 1.4 in s'pore.
haa. u noe if they got the 16-45?