is there any cheap,SR compatible 100-400 lens?

F99 · 07-19-2022, 10:10 PM

I have checked HD PENTAX-D FA 150-450mm, but it was too expensive...

I rarely takes my tripod with me, but instead I uses monopod or even with handheld. so, compatilblity with SR matters.

I'm willing to pay up to 500$.

sharpness doesn't matters a lot.

is there any?

pschlute · 07-19-2022, 11:18 PM

The DA* 300mm f4 is a more manageable prospect. But any lens of any brand will be compatible with the SR system. Yo may need to input the FL yourself when you turn on the camera if it does not recognise the lens.

**PJ1** · 07-19-2022, 11:20 PM

If you want autofocus I think the only other option that is almost in your range is the Sigma 170-500 or 150-500. Either of them might meet your price point. The Pentax 55-300 used with the 1.4 tele-converter would give you an effective range of 77-420 but your maximum aperture will be about f8 at the short end and f9 at the long end. You would need to have good light or be prepared for slow shutter speeds. On the other hand, if you are happy with manual focus, then any lens that covers the 100-400 range might be OK. Remember that Pentax has in-body SR. It is independent of the lens.

kypfer · 07-19-2022, 11:29 PM

All lenses are "SR compatible" … it's the Pentax body that has the SR mechanism

For "extreme budget" telephoto there's a lot to be said for the older FA 100-300mm f/4.5-5.6 and it's variants … mine cost me £2, but it really needs a lens hood, which cost more

Third party companies like Sigma and Tamron should also be considered … often cheaper than their Pentax "equivalents" … again, try to get one with a lens hood if it's a custom bayonet fit.
Even one of the early Sigma 170-500mm "bigmas" might be found within budget if you're lucky

**yucatanPentax** · 07-19-2022, 11:53 PM

You may want to consider the HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE lens for handheld and walk-about use.

It is not 400mm, but cropping can get you there. On an ASPC sensor, it would be a 450mm equivalent.

You mentioned the word 'cheap' and while there might be some older used Sigmas or Tamrons to be found that may be inexpensive on the used market, the PLM IQ is likely going to be as good or better after cropping.

You should be able to find a good 55-300mm PLM for around $300 on the used market. New, they run around $400 (currently on sale at B&H and Adorama).

**Papa_Joe** · 07-20-2022, 12:08 AM

Sigma 120-400 and 50-500 are to be mentioned as well. All the "Bigmas" do meet your requirements quite well, athough you have to do a bit of research to find one in your price range.

F99 · 07-20-2022, 12:33 AM

Thank you for your answers, by the way, what I meant 'SR compatible' is that the body can read Focus length from lens electrically.
I think I'll consider DA 55-300 or sigma lenses.

35mmfilmfan · 07-20-2022, 03:56 AM

Originally posted by F99

I have checked HD PENTAX-D FA 150-450mm, but it was too expensive...

I rarely takes my tripod with me, but instead I uses monopod or even with handheld. so, compatilblity with SR matters.

I'm willing to pay up to 500$.

sharpness doesn't matters a lot.

is there any?

Which Pentax body are you hoping to use it on ?

**UncleVanya** · 07-20-2022, 05:01 AM

It might not matter if the body can read the focal length as much as you might think. Use the tool linked in the link mentioned in this thread to set an optimal single setting for manual zooms. There are multiple optimization choices that influence the decision, and the tool output gives you the info so you can decide what focal length setting is optimized for your use.

https://www.pentaxforums.com/forums/173-general-photography/442712-setting-i...m-science.html

In the marketplace recently there were listings for a Sigma 120-400, a 50-500, as well as a 100-300 all of which offer the automation to inform the body of the focal length in use.

bschriver11 · 07-20-2022, 05:31 AM

Right in your price range with in lens OS. Sigma 150-500mm F/5-6.3 APO DG HSM OS K Mount Autofocus Lens For Pentax DSLRS {86} at KEH Camera.

vrrattko · 07-20-2022, 11:14 AM

I doubt 55-300 will work with 1.4xTC. Teleconverters are usually designed for fast high-quality lenses.

**AggieDad** · 07-20-2022, 03:03 PM

I second the mention of the Sigma zooms. I think you can find a well-cared-for 150-500 or 50-500 in (or very near) your price point.

MarkJerling · 07-20-2022, 04:09 PM

It's another +1 from me for the Sigma "bigma" 50-500. It's big and heavy but I get good results from it.

F99 · 07-20-2022, 05:12 PM

Originally posted by 35mmfilmfan

Which Pentax body are you hoping to use it on ?

I'm using a k-1.

**mikesbike** · 07-20-2022, 07:04 PM

DA 55-300mm (several versions) are designed for APS- C bodies, and would work ok on a K-1 with the camera set to crop mode.

07-19-2022, 10:10 PM	#1
F99 New Member Join Date: Jun 2022 Posts: 5	is there any cheap,SR compatible 100-400 lens? I have checked HD PENTAX-D FA 150-450mm, but it was too expensive... I rarely takes my tripod with me, but instead I uses monopod or even with handheld. so, compatilblity with SR matters. I'm willing to pay up to 500$. sharpness doesn't matters a lot. is there any?

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07-19-2022, 11:18 PM	#2
pschlute Moderator Loyal Site Supporter Join Date: Mar 2007 Location: Surrey, UK Photos: Gallery Posts: 8,198	The DA* 300mm f4 is a more manageable prospect. But any lens of any brand will be compatible with the SR system. Yo may need to input the FL yourself when you turn on the camera if it does not recognise the lens.

07-19-2022, 11:20 PM	#3
PJ1 Loyal Site Supporter Join Date: Jul 2012 Location: Toowoomba, Australia Photos: Gallery \| Albums Posts: 5,484	If you want autofocus I think the only other option that is almost in your range is the Sigma 170-500 or 150-500. Either of them might meet your price point. The Pentax 55-300 used with the 1.4 tele-converter would give you an effective range of 77-420 but your maximum aperture will be about f8 at the short end and f9 at the long end. You would need to have good light or be prepared for slow shutter speeds. On the other hand, if you are happy with manual focus, then any lens that covers the 100-400 range might be OK. Remember that Pentax has in-body SR. It is independent of the lens.

07-19-2022, 11:29 PM	#4
kypfer Pentaxian Join Date: Jan 2018 Location: Jersey C.I. Posts: 3,593	All lenses are "SR compatible" … it's the Pentax body that has the SR mechanism For "extreme budget" telephoto there's a lot to be said for the older FA 100-300mm f/4.5-5.6 and it's variants … mine cost me £2, but it really needs a lens hood, which cost more Third party companies like Sigma and Tamron should also be considered … often cheaper than their Pentax "equivalents" … again, try to get one with a lens hood if it's a custom bayonet fit. Even one of the early Sigma 170-500mm "bigmas" might be found within budget if you're lucky

07-19-2022, 11:53 PM	#5
yucatanPentax Loyal Site Supporter Join Date: Dec 2009 Location: Dallas / Yucatan Posts: 1,840	You may want to consider the HD Pentax-DA 55-300mm F4.5-6.3 ED PLM WR RE lens for handheld and walk-about use. It is not 400mm, but cropping can get you there. On an ASPC sensor, it would be a 450mm equivalent. You mentioned the word 'cheap' and while there might be some older used Sigmas or Tamrons to be found that may be inexpensive on the used market, the PLM IQ is likely going to be as good or better after cropping. You should be able to find a good 55-300mm PLM for around $300 on the used market. New, they run around $400 (currently on sale at B&H and Adorama).

07-20-2022, 12:08 AM	#6
Papa_Joe Site Supporter Join Date: Sep 2018 Location: SW Bavaria Posts: 562	Sigma 120-400 and 50-500 are to be mentioned as well. All the "Bigmas" do meet your requirements quite well, athough you have to do a bit of research to find one in your price range.

07-20-2022, 12:33 AM	#7
F99 New Member Join Date: Jun 2022 Posts: 5 Original Poster	Thank you for your answers, by the way, what I meant 'SR compatible' is that the body can read Focus length from lens electrically. I think I'll consider DA 55-300 or sigma lenses.

07-20-2022, 03:56 AM	#8
35mmfilmfan Pentaxian Join Date: Oct 2016 Location: Norfolk, UK Posts: 4,329	Originally posted by F99 I have checked HD PENTAX-D FA 150-450mm, but it was too expensive... I rarely takes my tripod with me, but instead I uses monopod or even with handheld. so, compatilblity with SR matters. I'm willing to pay up to 500$. sharpness doesn't matters a lot. is there any? Which Pentax body are you hoping to use it on ?

07-20-2022, 05:01 AM	#9
UncleVanya Loyal Site Supporter Join Date: Jul 2014 Photos: Gallery \| Albums Posts: 28,401	It might not matter if the body can read the focal length as much as you might think. Use the tool linked in the link mentioned in this thread to set an optimal single setting for manual zooms. There are multiple optimization choices that influence the decision, and the tool output gives you the info so you can decide what focal length setting is optimized for your use. https://www.pentaxforums.com/forums/173-general-photography/442712-setting-i...m-science.html In the marketplace recently there were listings for a Sigma 120-400, a 50-500, as well as a 100-300 all of which offer the automation to inform the body of the focal length in use.

07-20-2022, 05:31 AM	#10
bschriver11 Pentaxian Join Date: May 2008 Location: Maryland Photos: Gallery Posts: 558	Right in your price range with in lens OS. Sigma 150-500mm F/5-6.3 APO DG HSM OS K Mount Autofocus Lens For Pentax DSLRS {86} at KEH Camera.

07-20-2022, 11:14 AM	#11
vrrattko Veteran Member Join Date: Jun 2010 Photos: Albums Posts: 753	I doubt 55-300 will work with 1.4xTC. Teleconverters are usually designed for fast high-quality lenses.

07-20-2022, 03:03 PM	#12
AggieDad Site Supporter Join Date: Jan 2015 Location: Houston, TX Photos: Gallery \| Albums Posts: 1,453	I second the mention of the Sigma zooms. I think you can find a well-cared-for 150-500 or 50-500 in (or very near) your price point.

07-20-2022, 04:09 PM	#13
MarkJerling Moderator Site Supporter Join Date: May 2012 Location: Wairarapa, New Zealand Photos: Gallery \| Albums Posts: 20,406	It's another +1 from me for the Sigma "bigma" 50-500. It's big and heavy but I get good results from it.

07-20-2022, 05:12 PM	#14
F99 New Member Join Date: Jun 2022 Posts: 5 Original Poster	Originally posted by 35mmfilmfan Which Pentax body are you hoping to use it on ? I'm using a k-1.

07-20-2022, 07:04 PM	#15
mikesbike Site Supporter Join Date: Dec 2016 Location: Southeastern Michigan Posts: 4,549	DA 55-300mm (several versions) are designed for APS- C bodies, and would work ok on a K-1 with the camera set to crop mode.